No RDJ = No Avengers 2???

Well that's something. I hope RDJ is part of this. If he isn't... well, let's see what good old Uncle Joss had to say...

"He is Iron Man," Whedon said. "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."

I hope he's right.