Re: Changing the roster for Avengers 2?
I think they'll just add instead of rotate. Cap, IM, and Thor will stay. The only way I see the Hulk leaving is if he turns on the Avengers, which I highly doubt after the end of the first film.
Panther, Ant Man, and Wasp are locks. Vision and Ms. Marvel are probables.
Case Study of the IMPROMPER Way to Adapt a Challenging Character: Venom, Spider-man 3.
Case Study of the PROPER Way to Adapt a Challenging Character: Gorilla Grodd, "Grodd Lives", The Flash TV Series.