Hulk

"That's my secret Cap, I'm always angry."

- Bruce Banner

Dr. Robert Bruce Banner is a renowned scientist in the fields of, , and gamma radiation. However, after a Gamma Radiation experiment went awry, the mild-mannered scientist found himself plagued with a peculiar condition. When angered or provoked, he would transform into the rage fueled and nearly mindless, green-skinned monster known as the Hulk.

Fearful of the damage that the Hulk could inflict, Dr. Banner chose to live a discreet life in remote parts of the world, working to cure the sick and help the poor while trying to elude those who would take advantage of his ability to change into the enormous, green menace.

When a mounting threat called for Banner's specialized scientific expertise, S.H.I.E.L.D. Director Nick Fury recruited him, knowing full well that the incredible strength of Banner's alter ego, the Hulk, would be an additional asset to the Avengers. After the Avengers split up, he became good friends with Tony Stark and was also given the freedom to live in the world without being hunted down.

Early Life
Robert Bruce Banner was born on Thursday, December 18, 1969. As he grew up, he started going by his middle name. Bruce met Betty Ross while in college where they both fell in love. They soon graduated and moved on to work together at Culver University as instructors. Bruce later met Erik Selvig, another one of the university's instructors.

Gamma Accident
Bruce and Betty Ross were recruited by the US Army to work on a top-secret research project under the guise of researching radiation resistance called the Bio-Tech Force Enhancement Project. However, the project's true intention was to duplicate the results of Project Rebirth by making Super Soldiers using a combination of Bio-engineering and gamma radiation. The project was run under the watch of General Thaddeus Ross, who is the father of Bruce's then girlfriend, Betty.

Eventually, Banner became so confident in his work that, in order to prove his work's worth, he decided to test it upon himself. However, the combination of what was really a replication of the Super Soldier Serum and an above lethal amount of Gamma Radiation caused Bruce to undergo a violent transformation. The affects of the procedure caused Bruce Banner to develop the alter ego, the Hulk, temporarily transforming him into a giant, green-skinned, muscle-bound titan with incredible strength, but who posed very little intelligence and was driven by fits of extreme rage, however, his transformations were temporary.

An enraged, nearly mindless Hulk destroyed the lab, hospitalizing his lover Betty, and crushing General Ross' arm. Bruce tried to visit Betty while she was in the hospital, but her father made him leave and told him that when he left the United States Armed Forces would come after him. Now a fugitive from the United States Army, and Betty's father, General Thaddeus Ross, Banner went on the run.

Three days after the accident, Ross met Banner in a hospital, offering him to take him to a lab in Maryland. Banner refused, though blamed himself for all the people he hurt, including Betty Ross. Banner ran off, prompting Ross to order his troops to chase after him, only to find that Banner was gone.

The Chase
Banner, while escaping from Thaddeus Ross' troops, hid inside a trailer, unbeknownst to the driver. When reaching the Canadian border, the driver was pulled over for a vehicle inspection. Upon opening the trailer, the border patrol officers found Banner and brought him in for questioning. Enraged, Banner transformed into the Hulk and tore up the freeway, before making his way to Canada.

In South America, Banner discovered a lost boy named Miguel on his travels through the jungle. Banner offered to help the child and take him to a nearby village for directions. Banner was soon attacked by Espinoza and his men, under the impression that he was a spy. After being beaten into telling the truth, Banner transformed into the Hulk and destroyed the terrorist hideout.

Emil Blonsky and his team later arrived at the village discovering a path of destruction left by the Hulk, whose whereabouts were still unknown.

Meeting Nick Fury
"No, I don't think your gonna want to be doing that. At least I don't think the man I just met-the man inside you-wants to do that. He seemed like a decent enough guy who wouldn't want to hurt these people."

- Nick Fury to the Hulk

While Bruce was on the run, he visited a bar, not knowing he is being followed by Nick Fury, who was trying to find Bruce and learn what General Thaddeus Ross' "Super-Soldier Program" did to him. He tried to earn Bruce's trust by buying him a beer but he refused, saying he was "sort of a mean drunk."

Fury continues to try to earn his trust, until he eventually tries to test his abilities by making two S.H.I.E.L.D. agents appear to be dating and that one was cheating on the other with Bruce which made Bruce confused about the situation. The other started to fight Bruce, but Fury tried to act like he was going to help him, but Peterson punched him in the face.

This turned Bruce into the Hulk and he went on a rampage. Fury and everyone else in the bar were surprised by his transformation. Fury tried to calm him down, but Hulk yelled at him causing nearly all of the glass in the room to shatter. Fury didn't move at all. Hulk then ran out through the wall.

Two days later, Fury called a meeting for S.H.I.E.L.D. operatives, including Phil Coulson. He told them that the Hulk was only a secondary threat.

Failed Suicide Attempt
"The cell was just in case-" "In case you needed to kill me, but you can't. I know! I tried! I got low. I didn't see an end so I put a bullet in my mouth, and the other guy spit it out. So I moved on, I focused on helping other people. I was good, until you dragged me back into this freak show. You put everyone here at risk. You wanna know my secret, Agent Romanoff? You wanna know how I stay calm?"

- Bruce Banner to the other Avengers and Nick Fury

Seeing no end to his run from Ross, Banner went up to Greenland to shoot himself. He shot himself in the mouth but transformed into the Hulk, who spat out the bullet.

Brazil
Banner eventually settled in Rio de Janeiro, Brazil, working in a soft drink bottling factory that produced Pingo Doce while attempting to find a cure for his condition with the help of an Internet friend, "Mr. Blue". He also studied martial arts and meditative breathing techniques with a expert to help control his emotions and heart rate, and because of this, had not suffered a transformation for five months.

After Banner was cut while working in the factory, his blood dripped into a soda bottle where it was eventually drank by an ill-fated consumer in Milwaukee, Wisconsin. General Ross used this incident to discover Banner's location, and sent a team to capture him, led by Russian-born British special operations expert Emil Blonsky. Following a ferocious battle in the soft drink bottling plant where he transformed into the Hulk, Banner escaped Blonsky, and awoke in Guatemala.

Going Back Home
Following the advice of "Mr. Blue" to gather more information on the incident that started his transformations, in order to research a more effective cure, Banner traveled back to the United States. Upon returning home, he saw that a now-recovered Betty had continued working at Culver University and was dating psychiatrist Leonard Samson. He also met with his old friend Stanley, a pizzeria owner, who gave him a job as a delivery boy. Banner used this job to sneak past a security guard to continue his research. After Betty visited the pizzeria and saw Bruce, she later reunited with him and gave him the missing pieces of their research.

Battle at Culver University
Emil Blonsky reported to General Thaddeus Ross that Banner evaded them in Brazil due to the appearance of a large green monster. Ross explained to Blonsky that the monster was Banner, and that he was created accidentally during an experiment in radiation-resistance that was inspired by World War II era military bio-force enhancement research (or "Super-Soldiers", as Blonsky put it). Blonsky, seeking both revenge and power, volunteers as a test subject in order to capture Banner. He received a small dose of the mothballed original Super Soldier Serum, created by Dr. Reinstein for Weapon Plus. He led an assault on Banner at Culver University, during which Betty Ross was knocked unconscious. Despite Blonsky's increased strength, speed and agility, Hulk crushed most of the bones in Blonsky's body. Hulk saved Betty from an explosion and escaped with her to the Smoky Mountain National Forest.

Meeting Mr. Blue
"You should know that there is a flip side to this too. If we miss on the low side, if we induce me and it fails, this will be very dangerous for you." "Ha-ha-ha. Look, I've always been more curious then cautious and that's served me pretty well, so are we gonna do this?"

- Bruce Banner and Samuel Sterns

Banner and Betty Ross then traveled to Grayburn College in New York City, where they met "Mr. Blue", a resident scientist named Samuel Sterns. Accompanying Sterns to his lab, Banner and Betty learned that Sterns has developed a possible antidote that could potentially cure Banner's condition, or merely reverse each individual transformation, while an overdose could kill him. Despite the risks, Banner agreed to test Sterns' antidote and was restrained and transfused with the cure mid-transformation, after being electrically induced into transforming; he was successful in returning him to normal. Exhilarated by the success of the antidote, Sterns revealed that he has synthesized Banner's blood sample into a large supply with the intention of using it to enhance the human condition to the next evolutionary level. Appalled by what Sterns had done and fearful of the Hulk's power falling into the wrong hands, Banner attempted to convince Sterns to immediately destroy the blood supply but was shot by a tranquilizer from one of General Thaddeus Ross' snipers.

Duel of Harlem
"What are you saying? You think you can control it?" "No no no, not con-not control it, but, I don't know, maybe aim it."

- Betty Ross and Bruce Banner

As both Banner and Betty Ross were taken into custody, a freshly healed Emil Blonsky, seeking the Hulk's power, demanded that Samuel Sterns subject him to a transfusion of Banner's synthetic blood. Sterns warned that the combination of the Super Soldier Serum and the Gamma Radiation in the blood would be an unpredictable combination that could turn him into an "Abomination". Blonsky was less than concerned about this, and Sterns promptly administered the transfusion. As Blonsky mutated into the monstrous Abomination, he knocked Sterns aside and an irradiated sample of Banner's blood-derivative dripped into an open wound on Sterns's temple, causing his cranium to mutate and expand.

Seeking a challenge to match his new strength, the Abomination went on a rampage through Harlem. Banner, realizing that he was the only one who could stop the Abomination, convinced General Thaddeus Ross to release him. He jumped from Ross' helicopter as it hovered over the city, hoping the fall would stimulate his adrenal glands into triggering a transformation. Banner's plan succeeded and after a brutal battle the Hulk managed to defeat the Abomination by strangling him with a huge chain, though he released his grip after a plea from Betty. The Abomination collapsed, and the Hulk fled the scene with the Army in pursuit.

Gaining Control of the Hulk
Thirty-one days after his fight with Abomination, Banner arrived at Betty Ross's cabin in Bella Coola, British Columbia. He left Betty a note along with a necklace that he reclaimed after she had to sell it. Now more focused on gaining control over his transformations into the Hulk, and the Hulk itself, Bruce entered a meditative stance. His eyes turned green as he pushed his heart rate higher and a grin appeared on his face.

Moving Countries
At some point, Banner crossed the border from Pakistan into India. An incident involving some local mercenary bandits forced him into transforming into the Hulk and protecting local residents from the attempted terrorist attack.

Initiation
"It's good to meet you, Dr. Banner. Your work on anti-electron collisions is unparalleled. And I'm a huge fan of how you lose control and turn into an enormous green rage monster." "Thanks."

- Iron Man and Bruce Banner

Banner had been working as a doctor in Kolkata, India having not transformed for over a year. He was tricked into contact with Natasha Romanoff by a little girl and was brought into the Avengers Initiative and asked to find the Tesseract.

Attack on the Helicarrier
"Target acquired. Target engaged. Target angry, target angry!"

- A pilot trying to stop Hulk's rampage After meeting and befriending members of the team on the Helicarrier, Banner and Tony Stark began research on the recently captured Loki's scepter. When the team began to spark unnecessary arguments, the brainwashed Hawkeye led a team of mind-controlled soldiers into the ship and destroyed one of the engines, causing Banner and Black Widow to fall into the weapons cache room. Banner transformed unwillingly despite Romanoff's efforts to calm him down and ended up falling off the Helicarrier after causing much destruction and even throwing down with Thor. He eventually transformed back into Banner to find himself having been watched falling by a security guard. He gave Banner some new clothes and a motorcycle.

Battle of New York
"That's my secret Cap, I'm always angry."

- Bruce Banner

Banner returned to fight in the battle of New York and finally revealed his secret of keeping calm: he is always angry. Banner transformed into Hulk and took out a Leviathan with one punch then aided the Avengers in the battle. After assisting Thor, Hulk entered the Stark Tower and beat Loki into submission. The World Security Council eventually sent a missile to destroy Manhattan. Stark flew the missile to the Chitauri's Wormhole, though his suit shut down in the process. Hulk caught Stark and screamed in his face, waking him up.

Later, all of the Avengers silently ate at the Shawarma Palace. They were interrupted by War Machine, who arrived too late to aid in the battle. After Loki was sent back to Asgard with Thor and the Tesseract, Banner and Stark drove away in one of Stark's sports cars and then the Avengers went their separate ways.

Freedom
After fighting in the Battle of New York, Banner was able to show that he could keep the Hulk under control. Nick Fury made it so that Banner could move around in the world without being afraid of being arrested or kidnapped.

A Therapy Session
"You with me?" "I was. Yeah. Mmhm. Where were we at, um." "You're actively napping?" "I was-I-I drifted." "Where did I lose you?" "Elevator in Switzerland." "So you heard none of it?" "I'm sorry, I'm not that kind of doctor. I'm not a therapist. It's not my training."

- Tony Stark and Bruce Banner

Some time after his battle against Aldrich Killian, Tony Stark came to Dr. Banner to talk about his traumas. But Banner fell asleep near the beginning of the session, so Tony told Bruce more stories about his life, to which Bruce again quickly fell asleep.

Targeted by HYDRA
Bruce Banner was mentioned by Jasper Sitwell as one of the numerous individuals who posed a threat for HYDRA's plan, as concluded by Arnim Zola's algorithm for Project Insight.

The Genius of Banner
When Nick Fury was discovered alive after a HYDRA assassination attempt, he explained that he used Tetrodotoxine B, an anti-stress serum developed by Bruce Banner, to slow his heart to a beat per minute to fake his death.

In order to defeat Marcus Daniels, Leo Fitz used the Gamma Power Reserve designed by Bruce Banner to modify the stage lights of the Portland Symphony Orchestra to emit concentrated beams of light.

Personality Traits
After the incident at Culver University, Banner became obsessed with finding a cure for his mutation. He is afraid of hurting someone unintentionally, so he tries not to get close to something or someone that leaves him stressed. He supplemented his scientific pursuit by learning meditation and breathing techniques, gaining a greater control over the transformations. When he transforms, his personality regresses to atvmore child-like state and he has little recollection of events after he returns to his normal human form.

In his earliest transformations, Banner appeared as a savage with no real ability to distinguish friend from foe. Because of this, he was responsible for the deaths of two scientists, an army officer, a police officer from Idaho, and two Canadian hunters when he was a fugitive. The Hulk gradually attained a better reasoning capacity over time, becoming able to show affection and demonstrating a capacity to work collaboratively with others. Despite the savage state, the Hulk has some degree of memory. This was proven when after his fight against Thor, he still held a grudge long enough to punch him after they worked together.

However, Banner has been shown that out of all the Avengers, he is the one they respect but fear the most. Even Romanoff, who always is calm in every situation, fears him as shown twice when she pulled a gun on him in the hut when he appeared to lose his cool, but, in truth, he wanted to see if she was truly alone or not, and on the Helicarrier, when they were blasted out of the lab and he transformed and attacked her, showing terror in her face, very rarely does that happen with her.

Powers and Abilities
Due to a combination of an similar version of the Super Soldier Serum and exposure to high levels of gamma radiation, Bruce Banner is a "mixed result" of what Rogers is. As Bruce Banner, he has no visible powers. But when his heart beat increases to high levels or he loses control of his emotions, he transforms into the monstrous Hulk, a green-skinned giant. The Hulk's physical body attributes him great strength and power, which is fueled by his rage, meaning the madder he gets the stronger he gets. The Hulk is one of the most powerful beings on the planet since his powers increase with his rage. He can easily match beings like Thor and the Abomination.

Metamorphosis: Banner transforms into the Hulk as a result of the chemical catalyst of adrenaline and gamma radiation. When Bruce gets angry or excited enough to increase his heart rate to high levels, he transforms into a powerfully muscled and green version of himself, generally referred to as the Hulk. According to Dr. Samuel Sterns, the "gamma pulse" comes from the amygdala, and the enhanced cells absorb the gamma energy temporarily, and then it abates when Banner gets stressed, resulting in a chemical reaction that produces a myostatin primer. When the Hulk transforms back into Banner, the excess muscle mass and energy is dissipated. The total time of transformation falls anywhere between seconds to several minutes, depending on the initial adrenaline surge, which will be determined by the original stimulus. Initially, he was unable to control the transformations, but through training and practice has managed to attain some level of control.


 * Banner was unable to control the transformations, but through training and practice had managed to attain some level of control of his transformed form. Banner's consciousness is buried within the Hulk's, and can influence the Hulk's behavior only to a very limited extent such as when he changed into the Hulk to fight the Abomination where he managed to possess some human traits when asked by Betty Ross not to kill his enemy. Hulk also prevented an explosion from killing Betty and carried her to safety.


 * After a year of training to control the Hulk, Banner learned that if he always remains angry in a controlled state then he can easily change into the Hulk at will. This type of transformation allows the Hulk to be much smarter and less enraged in battle.


 * However, if Bruce is sent into a state of stress then he can still lose control and transform against his will despite trying to control it. This Hulk seems to revert back to a savage enraged state where he would attack anyone being friend or foe.

Bruce Banner

 * Genius level intellect: In his Bruce Banner persona, Banner possesses a genius level intellect, especially when it comes to Gamma energy and radiation. Bruce Banner is a gifted scientist with particular expertise in nuclear physics and biochemistry, famous for being one of the foremost geniuses of his generation. He is a highly rated expert in gamma radiation and according to Tony Stark his work on anti-electron collisions is unparalleled. Agent Coulson also compares him to Stephen Hawking.
 * Average stamina: Banner also has quite a bit of stamina, having outrun Emil Blonsky and his team in Brazil.
 * Average martial artist: He learned Aikido and meditative breathing basic techniques, while in Brazil, with a martial arts expert.
 * Multilingual: When he lived and traveled in South America, he demonstrated fluency in English, Portuguese and Spanish.

Hulk

 * Superhuman Strength: The Hulk´s primary power is his superhuman strength, enabling him to do feats like split a car in two with just two punches. He stopped a Humvee in its tracks and picked it up and slammed it into a tree a couple of times; he also took the entire engine of the same Humvee and threw it into another Humvee, making it explode. He threw Emil Blonsky more than 40 feet away with just one kick, even though the latter has been given great resistance, and threw a forklift truck in the air very easily. He can throw normal humans around like ragdolls. In the form of the Hulk, Banner possesses immense physical strength, almost unparalleled except to a few. As the Hulk, he was able to rip steel as it was made of paper and was able to throw heavy objects with tremendous force. His strength is only rivaled by the Abomination. In times of stress, the Hulk's adrenaline level escalates, causing a corresponding escalation in strength. This is not accompanied by an additional gain in mass, but does appear to promote increased levels of energy efficiency. To date, the Hulk has never apparently been provoked into demonstrating a maximum output of strength, hence his upper limit could very well be limitless. However, if there is a limit, it is well in excess of 100 tons. This was also displayed when seeing Betty in danger in the damaged helicopter, he out-muscled the Abomination to free himself. By raising his fists and arms and striking the ground, he can create tremors of incredible force that stunned the Abomination. He was also able to go toe to toe against Thor with and without Mjølnir, demonstrated by hitting him hard enough to make the thunder god's nose bleed. Moreover, he could defeat easily and individually the God of Mischief Loki by slamming him repeatedly to the ground respectively. Another great demonstration was when he took down and killed a Leviathan with one single massive punch. Most important of all, he tore through scores of Chitauri soldiers with ease.
 * Superhuman Leaps: The Hulk's great strength also extends into the highly developed muscles of his legs which allows him to leap great distances. When he transformed into the Hulk in the bottle factory in Rio, Banner escaped Blonsky and Ross to Guatemala, making it there by morning; he traveled at least 1500 to 1600 miles in over 7 to 10 hours after the attack on him. In addition, the Hulk also shows incredible precision with his ability to aim his jumps and landings. He reached the top of Stark Tower from ground level, in a single leap. Also, he was able to catch Stark in mid-fall after Stark came back through the portal by leaping off a building and skirting the top off a car onto the ground with ease.
 * Weaponization: The Hulk demonstrates the ability of using his strength to turn anything in the environment around him into weapons and/or armor to use. During the Battle at Culver University, he turned pieces of a metal art work into a shield to use when Blonsky attacked him with a grenade launcher, using one piece to protect him against the waves of the sonic cannons and using the same piece to destroy one of the Humvees carrying one of the cannon by throwing it and splitting in half, and then, talking the other piece to jump into the other Humvee by basically jump-diving into it and using it to destroy an attacking Apache helicopter. Finally, during the battle with the Abomination, he split a police car in half to use it as a pair of boxing gloves to beat into Blonsky, and, using a large chain that Blonsky was using, the Hulk nearly choked him to death before being stopped by Betty Ross.
 * Thunder Clap: By clapping his hands, he was able to make a shockwave that snuffed out a fire.
 * Superhuman Durability: The Hulk is able to withstand substantial punishment; even high caliber bullets bounce off him and fire causes much less damage compared to a human. His bone, skin and muscles are overly dense, hard, and tough and he possesses a high degree of resistance to injury, pain, and disease. Only beings with tremendous force or extremely powerful weapons can harm him. The Hulk also withstood multiple energy blasts from Chitauri weaponry, maximized cold without freezing in the Arctic Circle, and great impacts from heights of over six miles. After he tried to kill himself in the Arctic, he fell into the ocean but nonetheless, he was able to survive the tremendous pressures of the ocean's deep and then walked along the bottom of the ocean until he reached land, indicating his body has developed and evolved to a point that he can survive in even the most extreme and harshest of environments that most regular humans cannot survive without specialized equipment. He was also able to withstand Thor in one-on-one combat, even when Thor used Mjølnir against him, giving him a direct swing from it and crashing into an nearby S.H.I.E.L.D. jet fighter. All it did was just make him even angrier.
 * Superhuman Endurance: The Hulk has substantially greater endurance than a normal human. His body counteracts fatigue poisons that build up in his muscles during physical activity, allowing the Hulk to run and fight for a long time. While fighting others in an enraged state, he can maintain peak output for hours on end and still continue to become even stronger as his anger escalates.
 * Superhuman Speed: Regardless of his size, Hulk's superhumanly strong legs allow him to run at speeds that are far beyond the natural physical limits of even the finest human athlete. Nevertheless, this does not grant him any enhanced reflexes or agility, as smaller foes exploit his size and use it to their advantage. Nonetheless, he was able to keep up with Blonsky (who himself was enhanced by Super Soldier Serum).
 * Superhuman Healing Factor: Despite his high resistance to physical harm, it is possible to cause the Hulk injury. However, the Hulk is capable of regenerating damaged or destroyed areas of his body with far greater speed and efficiency than an ordinary human. Grievous bodily harm has also proven to be a trigger for Banner's transformations, and he has recovered from otherwise fatal injuries sustained in his normal form. Banner said he tried to put a bullet through his mouth but the "other guy" merely spit it out. Hulk also has an enhanced immune system; Dr. Samuel Sterns described that a synthesized sample of Banner's blood would make humans impervious to diseases. After being bombarded with Chitauri weapon fire, all he showed was a bloody nose; however, sometime later, he had completely healed from the injury.

Friends and Allies

 * Betty Ross - Lover
 * Leonard Samson - Psychotherapist and Friend
 * Stanley - Friend
 * Avengers - Teammates
 * Steve Rogers/Captain America - Team Leader
 * Tony Stark/Iron Man - Collaborator, Colleague, and Friend
 * Thor
 * Natasha Romanoff/Black Widow
 * Clint Barton/Hawkeye
 * S.H.I.E.L.D. - Allies
 * Nick Fury
 * Maria Hill
 * Phil Coulson
 * Jasper Sitwell † (former)
 * Erik Selvig - Ally

Video Game Only

 * Rick Jones - Friend

Enemies

 * Loki
 * Thaddeus Ross
 * Emil Blonsky/Abomination
 * Samuel Sterns - Ally turned Enemy
 * Chitauri
 * Ultron

Video Game Only

 * U-Foes
 * Vector
 * X-Ray
 * Ironclad
 * Vapor
 * Glenn Talbot

Behind the Scenes

 * An alternate opening sequence scene was shot for The Incredible Hulk, though it was eventually cut from the final draft of the movie. In the scene, Bruce Banner travels to Greenland to commit suicide due to his incurable Hulk transformations. Banner shoots himself in the mouth, which only serves to trigger his transformation into the Hulk, who's appearance destroys the glacier they are on. This scene is still considered canon because it is referenced in The Avengers by Mark Ruffalo's Bruce Banner.
 * Additionally, within the deleted scene is a Captain America "easter egg" in the form of the silhouette of his body and shield encased in ice; though it is widely cast aside as a subtle nod anyway as it contradicts the continuity of the Cinematic Universe based on his placement. This is disregarded due to the scene remaining canon through spoken account and not by what is visually present in the deleted scene.
 * There are several noticeable visual differences between the Hulk in The Incredible Hulk and The Avengers, despite the fact they are both in the same continuity. The Hulk in The Incredible Hulk is slightly taller than he is in The Avengers, although this cannot be collaborated because the Hulk in The Avengers was hunched over. He is more slender in The Incredible Hulk than he is in The Avengers, and has darker green skin, and in The Avengers he has a shorter hair cut. Their faces are also slightly different. Much of these differences are because Mark Ruffalo is using motion-capture to actually play the Hulk, whereas Hulk was entirely CGI in The Incredible Hulk. As well, it's very likely that due to Banner's apparent weight gain (as Mark Ruffalo looks bigger than Edward Norton), the Hulk takes on a size and appearance based on Banner's physicality; therefore, in The Incredible Hulk, he would be "skinner" and taller, as opposed to The Avengers, being shorter and stockier.
 * Hulk/Bruce Banner is one of a few characters who are played by different actors in different films. The others are James Rhodes, Howard Stark, Thanos and Fandral.
 * In The Incredible Hulk, Bruce is given a mailed package with the name "David B." on it. This is a reference to the TV series , where the character was renamed to David Bruce Banner.
 * So far, Tony Stark has appeared in every Marvel Cinematic Universe film that Bruce Banner was in.
 * Mark Ruffalo was uncredited for his appearance in Iron Man 3.
 * To prepare for the role of Hulk in Avengers: Age of Ultron, Mark Ruffalo worked with motion capture expert Andy Serkis.