Originally Posted by Mr. Dent
I don't know about the majority. Hemsworth, Evans, and maybe Johanson are free game but Ruffalo signed a 9 picture deal with the first Avengers I believe, and he'd only be on the 4th come Avengers 3 if that. Barton signed a 9 picture deal as well, and he basically only gets used for Avengers movies. Doesn't even look like he'll be in Cap 2 right now. And I'm certain RDJ will stay on for as long as he's realistically able to. He's basically a partner of the films right now and loves doing them on top of that.
Ruffalo signed a 6 picture deal, which would have included TA.
I'm pretty sure Renner didn't sign a 9 picture deal either, I think it was more like 5.