The world's greatest superheroes battle The Crime Syndicate in the streets of Washington, D.C. But a new villain bent on his own form of conquest prevents any other heroes from helping save the nation's capital. It's up to the five members of the Justice League to save the city's people.

Brainiac arrives on Earth with a dire warning for the Justice League: there's a threat coming to destroy Earth, one that the heroes are ill-equipped to handle. But the combined forces of Justice League, the Justice League of America, the Titans, Teen Titans and the villains of the DCU certainly don't think so. Splitting into different squads, including Batman, Lobo, Wonder Woman, Cyborg, Deathstroke, Superman, The Flash, Harley Quinn, Robin and more,...