Marvel would really come out ridiculous from the perspective of the fans if there will be a different actor taking on the iron suit in “Iron Man 4” while Robert Downey Jr. still plays the role in the last two Avengers films. That would really be awkward, if not absurd.
All these speculations however would start clearing up once Marvel Studios makes an announcement sometime in the future on how it wants the franchise to move from “Iron Man 3.”
As far as Robert Downey Jr. is concerned, he was talking a lot about “Iron Man 4” last year but somehow started keeping mum about it this year. It is likely that negotiations are now in the works between him and Marvel Studios.
There was even a report that came out in November last year that Robert is convincing actor-friend Mel Gibson to take the directorial job for “Iron Man 4.”