It looks like the casting pendulum has swung back to Mickey Rourke for a villain role in Iron Man 2, but the reports can't seem to settle on exactly which bad guy Rourke will be playing. Since the producers and director have hinted that they'll be pursuing the "Demon in a Bottle" storyline dealing with Tony Stark's alcoholism, I think I've figured out the part they've got in store for the sequel, and they couldn't have cast it better.
Mickey Rourke as "The Bottle"!

Iron Man has his work cut out for him.