The League that everyone knew no longer exists...

They are the greatest heroes the world has ever known. Now, the most important among them is gone. The 'Man of Steel died protecting the planet, leaving the Justice League to carry on without him. But in his place, a greater, more experienced Superman from a vanished universe appears.

But this Superman is unknown to Batman, Wonder Woman, and the other heroes. And like Jessica Cruz and Simon Baz - the two new Green Lanterns - he has much to prove. But he must hurry, because a huge threat, something the team has never fought before, is coming.