Iron Man might have found his new arch rivals.

Rumors are swirling that Mickey Rourke and Sam Rockwell will be cast in the sequel, which is scheduled for a May 2010 release.

Rourke, who is currently garnering Oscar buzz for his role in The Wrestler, would play a tattooed Russian named Ivan. He eventually becomes Whiplash, a man with deadly, technologically enhanced coils.

Rockwell would portray Justin Hammer, a billionaire businessman that often feuds Tony Stark. You can currently see the actor in Frost/Nixon, playing David Frost's researcher, writer James Reston, Jr.

What do you think of these Iron Man 2 rumors?