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Official Site: DC Comics

Justice League: The Darkseid War is the penultimate story of The New 52 leading into DC Rebirth. This was the final story featuring Justice League in the New 52, before transitioning to DC Rebirth. This arc shows a prophecy come to fruition as the Justice League are caught in a war between Darkseid and the Anti-Monitor, only to find out someone else is facilitating it all for own scheme. The crossover received critical acclaim for the engaging plot, the action, and artstyle of Jason Fabok.

The dark secret of existence is that history has been destroyed and reborn over and over, in an endless repetition. As far as Metron is concerned, this is a cycle that must end. Metron was a being that observed the events of Flashpoint and Crisis on Infinite Earths. Metron is observing the DC Universe when he meets the Anti-Monitor.

The Anti-Monitor states that he is not going to destroy reality. Metron reminds that he has already begun, weakening reality to the point that even now, Brainiac is set on the path of causing a convergence of timelines. Metron offers a pact between the two of them. He promises that if the Anti-Monitor ceases his attempts to destroy reality, he will give up observing, and put every effort into restoring the Anti-Monitor to what he once was. Coldly, the Anti-Monitor responds that Metron does not have the power to do that, but he already knows who does. He intends to break the cycle of destruction on his own. Metron warns that if Mobius seeks this path, he will face the wrath of Darkseid. Unexpectedly, Omega Beams destroy the Mobius chair, and warns that he wants war with Darkseid. His death is the key to all, and despite losing his conveyance, Metron will bear witness to the end of the age of the New Gods. The age of the Anti-God will soon begin.

Metron looks up, to find that the one who destroyed the Mobius chair is in fact Darkseid's daughter, who seeks to see him dead.

Grail has not been a contender in any CBUB matches.