Another fanfiction idea could be a prequel to her role in Avengers: Endgame. It could show what she was doing in the cosmos just before she received the call to return to Earth. Maybe she was facing a different threat that was related to Thanos in some way, and this backstory could add more depth to her character in the movie.
One possible fanfiction could involve Spider - Man and Captain Marvel teaming up during the Endgame battle. Maybe Spider - Man uses his agility to distract the enemy while Captain Marvel blasts them with her powerful energy. They could also have some fun banter, like Spider - Man making a joke about how Captain Marvel can fly and he has to swing around.
Imagine in the fanfiction, Spider - Man discovers a new ability during Endgame that can complement Captain Marvel's power. He shares this with her, and they experiment with combining their powers in new ways. For instance, Spider - Man could create a web - like energy field using his new ability, and Captain Marvel could charge it with her cosmic energy to create a powerful shield or weapon against the enemy.
Imagine a fanfiction where Captain Marvel uses her energy - based powers in a completely new way during the final battle in Avengers: Endgame. Instead of just punching and flying around, she could manipulate the energy fields in a way that disrupts Thanos's entire army. This would be a creative take on her character and her abilities.
In the fanfic, their relationship might also be a bit of a culture shock. Peter is from Earth, a more down - to - earth kind of hero, while Captain Marvel has been in space and has a different perspective. This could lead to some interesting character development. They might start off not understanding each other but as the story progresses, they learn from one another and become a formidable team in the Endgame - like scenario.
Their dynamic could be really interesting. Peter is often the underdog, still learning about his powers, while Captain Marvel is a fully - fledged powerhouse. So it could be like a novice - veteran relationship, with Peter being in awe of her abilities and Captain Marvel being a bit protective of him.
Captain Marvel is Carol Danvers. She gained her powers through an interaction with alien technology and has become a powerful hero in the Marvel universe.
Captain America remains alive in the Endgame comic. The plot doesn't involve his death. This allows for his character to have ongoing story arcs and influences in the comic universe.