For MCU -- if we're nominating based on an MCU movie, can we/should we be treating anyone who shows up in an MCU movie as falling under this umbrella, even if the character is primarily associated with another fandom/franchise?

I'm thinking particularly of how to deal with the *waves hands* everything of Spider-Man: No Way Home. (I don't want to get into too much detail because spoilers, but I can in another comment with big spoiler warning if the mod wants).