Petersen said that the role of Superman was down to just Bale and one other actor, Josh Hartnett, and Petersen said the film almost went forward.
"It was pretty close," said Petersen. "And then the studio got a single Superman script I think from J.J. Abrams at that time, and [Warner Bros. chief] Alan Horn was so torn - because it's such a fascinating concept to do a Batman versus Superman film. And I still think it would be to do that. But the studio decided to try separate version of Superman and Batman, and then maybe think about down the road if you want to bring them together in one film."
Both Petersen's film and the Abrams Superman project fell through and the studio ended up moving forward with Christopher Nolan's Batman Begins in 2005, which lead to the mega-blockbuster 2008 sequel The Dark Knight as well as Bryan Singer's 2006 film Superman Returns.
It was said that one of the factors that shut down Petersen's film was that the studio had just greenlit his Green war epic, Troy.
The Dark Knight was released July 18th, 2008 and stars Christian Bale, Heath Ledger, Aaron Eckhart, Michael Caine, Maggie Gyllenhaal, Gary Oldman, Morgan Freeman, Monique Gabriela Curnen. The film is directed by Christopher Nolan.