In a flash of light, two universes merged. The Avengers, Earth's Mightiest Heroes, and the Justice League, the Sentinels of Liberty, unite to find a solution. But when a strange antagonist enters the scene with an Earth-shattering ultimatum, the teams must decide which will be the last world standing.
In a flash of light, two universes merged. the true source unknown, the Avengers, earth's mightiest heroes, and the Justice League, earth's sentinels of liberty, joined forces to discover the cause of collision. But with the world's greatest heroes occupied and twice the villains running the streets, It'll be up to M...