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.
"Yes, and Hawkeye is in the Avengers, but no one ever says, 'Help, Hawkeye.' "--Sheldon Cooper