Re: Changing the roster for Avengers 2?
Thankfully Marvel gets that, and they're willing to keep certain corners separate. Keep War Machine, Winter Soldier, most of the Guardians, Thor's merry friends, and eventually people like Dr Strange out of it. It helps make the universe feel bigger, anyway.
I'm fine with people like Pym, Panther, or Carol being added to the roster. And I definitely want Warlock in whichever Avengers movie features Thanos. But start stuffing everyone in there and they're not really "Avengers" movies anymore