Justice League: Crisis on Two Earths

In an alternate universe, an heroic Lex Luthor battles to save his planet from an evil variation of the Justice League! Now, to save his earth, Luthor enlists the Justice League from his universe's Crime Syndicate, a gang of villains with superpowers evenly matched with those of the Justice League. And in the ultimate battle of good versus evil, not only the fate of two earths hangs in the balance, but also the continuation of all existence!