Originally Posted by Bruce_Begins
WB knows that making a Justice League movie without Superman and Batman would be pointless, it would be like making an Avengers movie without Cap. America and Iron Man.
But including Superman after 2013 would need involvement of Siegel and Shusters in some capacity due to ongoing Lawsuit.
So, considering that, they would want to green light a JL movie before 2013 ends.
That means that They have to keep it in a separate continuity.
But, I may be wrong here.
Man of Steel as a franchise can continue unimpeded from the lawsuit. So if WB cannot negotiate a settlement with the heirs, the Superman in JL will be the Man of Steel Superman.