Vandal Savage steals confidential files Batman has compiled on the members of the Justice League, and learns all their weaknesses. The Justice League are a team of great power, but also of personal secrets they thought safe. That changes when the immortal supervillain, Vandal Savage, has Batman's Batcave secretly raided to learn them all and more. Soon, the Leaguers are individually beset by their enemies who attack them with inescapable death traps specifically designed with that information. With that, all seems lost until an indomitable Knight and a young Titan combine to deliver salvation even as Savage uses the opportunity to implement a far grander scheme.

A good version of Lex Luthor from a parallel Earth comes to the Justice League's dimension for help to fight their evil counterparts. Justice League: Crisis on Two Earths is an original direct-to-video animated superhero film released on February 23, 2010. It is based on the abandoned direct-to-video feature Justice League: Worlds Collide, which was intended as a bridge between the then-concluding Justice League animated television series and its then forthcoming sequel series Justice League Unlimited. Crisis on Two Earths was reworked from the Worlds Collide script to remove references to the TV series' continuity. The film is directed by Lauren Montgomery & Sam Liu and written by Dwayne McDuffie.