I have a theory for Captain Marvel. This is how I think parts of the beginning story could go: Carol is a half-human, half-Kree, but her powers aren't unlocked yet. In the film, the Kree Starforce are sent to steal the Tesseract from a Skrull infiltrated S.H.I.E.L.D. on Earth (potentially to gather Infinity Stones as part of a conflict in the Kree-Skrull War) and the Skrulls, through S.H.I.E.L.D., want to keep the Tesseract in their hands, so they get the US Air Force (including Carol and Maria Rambeau) to fly out and shoot down the Kree Psyche Magnitron, however, Carol's plane crashes with the Psyche Magnitron and the Tesseract which was stolen and put in the Psyche Magnitron explodes unlocking Carol's powers. Mar-Vell, who is on the Psyche Magnitron, picks up Carol and brings her to the Kree base after noticing that she is a Kree due to her green blood, and goes to wipe her memories after she was injured by the blast caused by the Tesseract in the Psyche Magnitron and they cure her, but in the process, they lie to her making her believe a new origin for herself. Before that, a Skrull came out to retrieve the Tesseract which is left behind as it's lost in the plane rubble. Then, Fury is sent out to retrieve the Tesseract and brings it back to the S.H.I.E.L.D. base. After Carol manages to find her way on Earth, somehow, she encounters Nick Fury and they go to stop the Skrulls and later the Kree from getting their hands on the Tesseract.
I just came up with this theory after the Tesseract was confirmed to be in the film by producer Jonathan Schwartz through a set visit.