We’ll file this under the rumor section for now.
Looks like the LA Times is reporting that a Justice League film may be hitting theaters rather sooner than expected. The date is supposedly sometime in 2013.
Here is the excerpt from the article:
“[Robinov is] aiming to release new Batman and Superman films in 2012 and Justice League, a teaming of DC’s top heroes, in 2013.”
I HIGHLY doubt this will happen this soon, but you never know.