In an interview with Military.com, actor Terrence Howard has revealed that shooting on the sequel to Iron Man will begin in March of 2009, which is a good thing, since the film is already on the release calendar for 2010. We know that Jon Favreau will be back to direct, and that Robert Downey, Jr. and Gwyneth Paltrow will return, as well.
What we don't know is...everything else. Of course, there were some tips of the hat to future stories and storylines in the film, but we don't want to discuss them here, in case you are one of the three people on Earth who have yet to see the movie. We're sure details will begin leaking soon.
Filmonic.com: Iron Man 2 To Start Filming March 2009?