On March 31st, Favreau wrote:
@jon_favreau More training. Start shooting Monday. Last of cast has arrived in LA.
If you're curious as to what Favreau meant about "more training", he even included a picture for us to take a look at. In the picture, we see Favreau himself in a boxing ring. Now, why would a director need to train? Because he isn't just the director of Iron Man 2 - he also plays "Happy" Hogan, Tony Stark's bodyguard.
To check the picture out CLICK HERE
Iron Man 2, directed by Jon Favreau, will continue the tale of Tony Stark and his armored alter-ego as he continues his transformation from billionaire industrialist to super-hero. Robert Downey, Jr. will star as Tony Stark, with Paltrow returning in the role of his assistant Pepper Potts. Don Cheadle, Mickey Rourke, Sam Rockwell, Scarlett Johansson and Samuel L. Jackson also star. Iron Man 2 blasts into theatres May 7, 2010.