Robert Downey Jr. WILL Definitely appear in Avengers 2, which is good news since Director Joss Whedon recently said the movies couldn't be made with him.
Whedon Via Daily Beast
He is Iron Man. He is Iron Man in the way that Sean Connery was James Bond. I have no intention of making Avengers 2 without him, nor do I think I’ll be called upon to do that. I don’t think it’s in my interest, Marvel’s interest, or his interest, and I think everything will be fine. But I know that this is Hollywood and you roll with things. You have to be ready for the unexpected. But I loved working with Robert, and everybody knows he embodied that role in a way no one else can. The day he was cast, I went up to [Marvel Studios president] Kevin Feige and said, “You brilliant son of a bitch.”
EW Inside Movies
Picture a big pile of money in that metal hand.
Robert Downey Jr. has reached a two-picture deal with Marvel Studios to appear in The Avengers 2 and The Avengers 3 — but notably
He reportedly earned more than $50 million for The Avengers, and although his multi-picture contract with the comic-book moviemakers was fulfilled by Iron Man 3, everyone involved was moving forward as if a deal for more films was inevitable.
“I’d go start another one tomorrow, but it’s not tomorrow,” Downey told EW when Iron Man 3 was debuting. “And there are a lot of other considerations. But I also don’t like the idea of leaving people hanging or leaving people in the lurch.”