In all likelihood, no, though he says he’d be into it. So move on from that fantasy. (And we haven’t even seen Iron Man yet!)
The reason I’m writing this is that, after thinking about WB’s Seventeen Magazine approach to casting The Justice League, I was heartened to read comments Jon Favreau made to MTV about the potential Avengers movie.
You can go read the whole article, but this is the important bit: "[But] in the case of Marvel they’re pretty clear on wanting to do it
with the actors who’ve established the roles or to not do it at all.
That’s what they’ve said to me,” he continued. “I think it’s a good
idea if you use the characters established in the other franchises that
then come together for an event. I don’t think they would do it like
they’re doing ‘Justice League’ where it’s a whole different set of
actors and a whole different take on the world."
So if we do see an Avengers flick it could potentially have all the ‘real’ actors who’ve filled out suits in standalone movies. That would make the movie a hell of an event, but also places it at the remote end of any spectrum of possibility. So don’t get any hopes up yet — in addition to Iron Man we’ve got at least the Hulk and probably Thor launches to get through first.
Edited to add: If ever there as a time for Marvel to experiment with a performance capture flick, this would be it. How else could the studio make a talent-heavy flick like this and keep all the standalone performers on board while also preventing the necessarily high level of destructive action from making the budget skyrocket out of all proportion? With Reservations about Beowulf and the pocap format in place, I’d be more enthusiastic for a pocapped Avengers than anything else.