Well, in an Avengers 'Never Have I Ever' fanfiction, it could start with the team sitting around after a mission. Captain America might say 'Never have I ever broken a rule just for the sake of winning a fight.' And then Thor could chime in with something like 'Never have I ever doubted my worthiness as much as when I lost my hammer.' This kind of interaction would add a new layer of depth to the relationships between the characters.
In Avengers fanfiction, a 'Never Have I Ever' scenario could be really interesting. For example, the characters might reveal secrets about their past battles or hidden feelings for each other. Maybe Iron Man could say 'Never have I ever been more scared than when I went into space in that first battle.' It would be a fun way to explore their personalities deeper within the fanfiction world.
A 'Never Have I Ever' in Avengers fanfiction could bring out some unexpected revelations. Black Widow could start it off with 'Never have I ever trusted someone completely from the start.' This would lead to other characters sharing their own experiences of trust and betrayal. It could also be a way to introduce new storylines, like how Hawkeye might respond with a story about a time when he almost lost trust in the team, which could then be developed further in the fanfiction.