Robert Downey Jr. Open to ‘Iron Man 4′: Why Give Up the Belt?’

The movie depends on a proper “proposal” from Marvel Studios, the actor said

iron man robert Downey Jr 3

Robert Downey Jr., the MVP of the Marvel movie universe and  highest-earning actor in Hollywood, is open to “Iron Man 4,” because, well, why not?

“It’s that thing of: Why give up the belt when it feels like you can barely get jabbed?” Downey said when Entertainment Weekly popped the big question on the set of “Avengers: Age of Ultron.”

See photos: ‘Age of Ultron’ First Look: Robert Downey Jr. and the Avengers Meet Their New Foe

After tense salary negotiations in 2013, Marvel announced Downey would return as Tony Stark for two “Avengers” sequels, but did not mention a deal for another “Iron Man” movie.

While Downey suggested he’s not ready to retire as Marvel’s man in the iron mask any time soon, he did firmly place the ball in the studio’s court. And since “Iron Man 3” grossed $1.2 billion in theaters around the world last year, it’s hard to imagine his employers don’t want to play.

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“It’s down to Kevin [Feige] and Ike [Perlmutter] and Disney to come to us with what the proposal is, and that’s on us to agree or disagree,” Downey said. “When things are going great, there’s a lot of agreement.”

See video: Robert Downey Jr. Defends Father Robert Duvall in ‘The Judge’ Trailer

Fans shouldn’t get their hopes up, though, because as Downey puts it, “The future, as usual, is uncertain.”