The star of The Lone Ranger had previously been lined-up to play the caped crusader in a movie called Justice League: Mortal - but the project was derailed by the 2007 writers' strike.
He told Metro: "I'm not actually a big fan of superhero films. If you have a guy who is supposed to be invulnerable, then what's the point?"
Hammer is set to appear alongside Man Of Steel star Henry Cavill in Guy Ritchie's update of The Man From UNCLE.
He joked: "I think if Henry and I did that film and then a superhero film straight after, people might start to wonder about us."
The follow-up to Man Of Steel will be a double-header with Superman and Batman.
Watch MTV News on the hour every hour on MTV - Sky Channel 126 and Virgin Channel 134