Originally Posted by AvengingLeague
So...Iron Man 4 would be titled "Iron Man Beyond" then?
In my dream scenario, yes. A problem with a connected film universe is that a Tony Stark reboot with a younger actor impacts all of the characters with whom RDJ's Stark has had a prior relationship. Though I love Don Cheadle as an actor, I felt recasting Rhodey really hurt the sequel. Recasting Banner with Ruffalo didn't face this issue as Norton's character had no prior interactions with other MCU characters.
Additionally, RDJ's performance as IM has been so iconic I think the character's best chance for success after he leaves the series is to go in a completely different direction with a new character driving the suit.