Alex GibneyAs the summer movie season begins Friday, what should you see? A new movie about a self-styled action hero, a larger-than-life character bankrolled by a fortune in corporate money, a man who wields enormous power, operates outside the law, fights for a cause, and runs up against his own overwhelming hubris? Or, you could go see 'Iron Man 2.'

Yes, Alex Gibney's documentary 'Casino Jack and the United States of Money,' the story of convicted lobbyist Jack Abramoff and the vast corruption scandal that centered around him, has a lot in common with the saga of cocky superhero Tony Stark, including a shared theatrical release date. Of course, 'Iron Man 2' is opening on more than 4,000 screens, while 'Casino Jack' is starting out on nine before expanding across the country over the course of the summer.

Still, that hasn't stopped the Oscar-winning Gibney from issuing a tongue-in-cheek challenge to 'Iron Man 2.' "We're going to go toe-to-toe with that motherf---er. We're going to take him out," Gibney told Moviefone during a recent interview. "Robert Downey, watch out. 'Casino Jack' is coming to get you."