Robert Downey Jr . will be back as Tony Stark in next month's Iron Man  3, and at tonight's Hollywood premiere of the film, he hinted that he might be ready to hang up Iron Man's suit for good after this film. The actor continued to play coy when we asked if he'll be back for another installment of the series — or appear in The Avengers 2 — but told us he has plans to continue working with his no. 1 collaborator: wife Susan Downey. Iron Man 3 hits theaters on May 3.