Batman learns he has a violent, unruly pre-teen son, secretly raised by the terrorist group known as The League of Assassins.

The world is under attack by an alien armada led by the powerful Apokoliptian, Darkseid. A group of superheroes consisting of Superman, Batman, Wonder Woman, The Flash, Green Lantern, Cyborg, and ...

The Flash finds himself in a war-torn alternate timeline and teams up with alternate versions of his fellow heroes to restore the timeline.