What if our greatest heroes became our greatest threat?

In an alternate reality, The Joker had tricked Superman into killing Lois Lane and their unborn son and destroying Metropolis. In retaliation, Superman murdered The Joker in front of Batman in a fit of wild rage and established a new world order as the high councillor.

A war ensued between the forces of Superman’s regime and those allied with Batman’s insurgency. Five years after the war began, the insurgency discovered the Justice League’s universe where The Joker’s plan did not succeed and transported several of its super heroes in order to help them defeat the regime. Batman and The Joker were confronted by the regime in a dystopian-like Metropolis, but Batman used his gear to help them both escape and go their separate ways.

Fighting for their own causes, superheroes from two realities must face-off in a battle of gigantic proportions. Which side will you choose?