While Iron Man 2 looks to be just as successful as its predecessor, a third Tony Stark film hasn't been mentioned before until now. The Associated Press caught up with Robert Downey Jr. and Zach Galifianakis who were promoting their new film Due Date at ShoWest and Downey Jr. appeared to indicate that he would return for Iron man 3. Here's an excerpt from the article.

Galifianakis said he expects to begin work this fall on the sequel to The Hangover, while Downey said he aims to suit up for a third Iron Man flick.
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While it's not a direct quote from Downey Jr., it seems a third film is in the cards. However, with The Avengers lined up for a 2012 release, it isn't quite clear when we will see Iron Man 3 in theaters. This third film could also be when fans could get a glimpse at the Mandarin as well.

Stay tuned as we'll be sure to keep you posted on any Iron Man 3 updates as soon as we have more information.