After some uncertainty about Robert Downey Jr.'s return for The Avengers 2 and subsequent Iron Man sequels, Marvel confirmed todaythat the actor will once again play Tony Stark...at least two more times.Last month, as Iron Man 3 raked in more than $1 billion worldwide, Downey balked at the idea of returning for another Shellhead sequel. Perhaps he still is? The movies he has signed on for are Avengers 2 and Avengers 3.

So what about Iron Man 4? Marvel Studios head Kevin Feige told Entertainment Weekly that series could continue without Downey:

"I believe there will be a fourth 'Iron Man' film and a fifth and a sixth and a 10th and a 20th. I see no reason why Tony Stark can't be as evergreen as James Bond. Or Batman for that matter. Or Spider-Man. I think Iron Man is a character just like that."

Some observers believed Downey's public hemming and hawing over future Iron Man sequels had to do with money. The actor famously earned tens of millions of dollars -- more than even director Joss Whedon -- from The Avengers because of back-end deals, and he had a similar deal for Iron Man 3.

However, the 48-year-old actor told EW it's more about time. Avengers 2 isn't set to hit theaters until 2015, and another Iron Man would presumably come out well after that.

"I'd go start another one tomorrow, but it's not tomorrow,' he said.