In such a fanfic, perhaps the other members of the Justice League might start to worry about Captain Marvel. They could think it's some sort of strange attack or the result of a new, unknown power affecting him. They might gather around him, trying to figure out what's wrong while also keeping an eye out for any potential threats.
One possibility is that while Captain Marvel is asleep, the Justice League has to face a new enemy without his help. This could lead to some members having to step up in ways they haven't before. For example, Aquaman might have to use his powers in a more creative way to deal with a threat that Captain Marvel would usually handle easily. And when Captain Marvel wakes up, he could be surprised at how well the team managed without him, leading to some character development within the team.
They would probably be very concerned. They might first check his vital signs to make sure he's okay. If they find nothing physically wrong, they'd start to consider other possibilities like magic or mind - control.
In a fanfic where Captain Marvel is abused in a Young Justice context, it could lead to a very dark and complex storyline. Maybe it shows his struggle to maintain his heroic nature while dealing with such trauma. It could also explore how the other Young Justice characters react to this situation, whether they try to help him or are themselves in danger due to his abuser.
There could be an emotional side to it as well. His friends in Young Justice would be worried about him. They would visit him while he's sick, and there could be some really touching moments. Maybe Wonder Girl would try to cheer him up with stories of their past adventures, and these interactions could show the strong friendship within the team.
Well, in an 'avengers meets justice league fanfic', a lot of character interactions are possible. Thor could share his knowledge of Asgardian magic with Wonder Woman who has her own set of magical items. Captain America and Aquaman might have a conversation about leadership and protecting their respective worlds. Also, the Scarlet Witch could use her powers to create illusions that would trick some of the Justice League members.
In a 'Captain Marvel Meet the Avengers' fanfic, there could be an epic showdown against a powerful villain. Captain Marvel's immense power combined with the Avengers' diverse skills would make for an amazing battle. For example, she could team up with Thor to take on an enemy that has the ability to control electricity. Their combined strength of her photon blasts and his lightning strikes would be a sight to behold.
There could also be a story where Captain Marvel has to prove herself to the Avengers. She might be seen as an outsider initially. So she has to show her worth through her actions. She could single - handedly take on a group of powerful villains to gain the Avengers' respect, and then they all work together towards a common goal.
She might use her superpowers accidentally during a school sport event, like making the basketball she throws fly all the way across the field and into the neighboring town.
Well, the plot could involve Captain Marvel being a reluctant hero in the Young Justice world. Maybe he's struggling with his dual identity while trying to fit in with the young heroes. There could be a big threat that only his unique powers can help with, but he has to overcome his own insecurities first.
One possible reason could be a sense of failure. Maybe in the fanfic, Captain Marvel fails to protect someone important in the Young Justice universe, like a young hero in training. This could lead to feelings of guilt and ultimately make him cry.
Maybe Captain Marvel has been overworking in the fight against villains in the Young Justice universe. He could be tired physically from all the battles and mentally from having to constantly make tough decisions. This tiredness might lead to him making mistakes or being less effective in combat, which could create a lot of drama and tension in the story.