Avengers: Age of Ultron: Episode 0 is a one-shot manga published in Weekly Shonen Magazine #31. The story was later adapted to English as Zombies Assemble #0. It is inspired by the events of the Marvel Cinematic Universe, and thus set before the events of Avengers: Age of Ultron.
Following a major battle in New York City, Tony Stark is severely injured and brought to the hospital. He is put in an ambulance and attempts to give his last words to Pepper Potts, who insists that he is not going to die. A reporter asks Stark whether he is afraid to fight, since he is simply a man in a suit of armor, worrying Potts.
While running Stark Industries, Potts says that she will support Sokovia regardless of the cost. Her team approaches her, worried that she is overworking herself, and she says that it is easy to get distracted while Stark is saving the world. One woman says that Stark cares about Potts a lot, and Potts expresses hope that she is correct.
Stark receives a letter and asks J.A.R.V.I.S. to scan it for fingerprints, but J.A.R.V.I.S. does not find anything to identify the sender. J.A.R.V.I.S. asks if he should notify Potts, but Stark tells him not to. J.A.R.V.I.S. encourages Stark to talk to Potts, but Stark refuses. Potts arrives in Stark's lab and Stark gets dressed. Potts says that she is worried about Stark and inadvertently gives Stark the idea to create a program to get rid of the problems on Earth.
Stark wants to promise to give up Iron Man and marry Potts after he is done, and shares this with Bruce Banner, who advises that he talk to Potts. Stark reads the letter he received, threatening to kill Potts if he does not destroy his armors. Stark decides to do it and tells Pepper, causing her to storm off angrily. Stark says that he wants to always be with Potts, making her happy, until they are attacked by Brad.
Potts recognizes Brad as a former employee of Stark Industries, and Brad expresses that he blames Stark Industries for the destruction of his home country, Sokovia. Brad destroys part of Avengers Tower and Potts falls out, and Stark manages to put on a suit and catch her in time. Potts asks him to stop hurting himself to protect the world, but Stark says that he is not doing it for the world. Stark engages Brad, but gets hit and falls unconscious, defeating Brad in the process. Potts hugs Stark, he wakes up and tells her that she is his priority. Stark promises to create a computer program to fix the world called Ultron.
- Tony Stark/Iron Man
- Pepper Potts
- Steve Rogers/Captain America
- Bruce Banner/Hulk
- Clint Barton/Hawkeye
- Natasha Romanoff/Black Widow
- Novi Grad Bombings (mentioned)
- Iron Man Armor: Mark XLIII
- Captain America's Shield
- Captain America's Uniform
- Hawkeye's Bow and Quiver
- Black Widow's Bite