How many more films is RDJ contracted for? I'm wondering whether they'll recast or reboot after his time is up.
I think Iron Man 3 is his last one.
That said, if he's still having fun and thinks he can still handle the role, I think he'll continue for a couple more.
If they decide to re-cast, I'd be taking a serious look at Dominic Cooper. He did a wonderful job as Howard Stark in CA:TFA and I think he'd make a great Tony.