Robert Downey Jr is all set to suit up again as
for Marvel's Captain America 3.
The actor had dropped hints that he was ending his stint as Iron Man after second and third instalments as Marvel has no plans to make a fourth movie about the self-made superhero.
Joe and Anthony Russo, the brothers behind Captain America: The Winter Soldier, are directing the third Captain America.
The movie would reportedly bring the Civil War storyline from Marvel's comic books to the big screen and trigger the start of a new phase of movies from Marvel Studios.
The plot will pit Stark against Captain America's alter-ego Steve Rogers, played by Chris Evans, as they fight over the superhero registration act, which forces anyone with superhuman abilities to reveal their identities to the US government.
Stark supports the programme, but Rogers is against it as he feels it threatens civil liberties. This will gradually turn Stark a villain of sorts in Captain America 3.
Marvel and Downey Jr are yet to confirm the news but the Hollywood Reporter said they are in talks and the actor's return to the role could see him reap $40 million.
The actor made more than $50 million for his work in the first Avengers, and sources said he was looking for something similar.
The three Iron Man movies have earned $2.4 billion worldwide, while the first Avengers earned a record-breaking $1.5 billion worldwide in 2012.