Justice League: Crisis on Two Earths (2010) for $2.90

The arrival of a heroic Lex Luthor--yes, you read that correctly--leads Superman, Batman, and the rest of the Justice League to confront their evil, alternate-universe identities in Crisis on Two Earths, a terrific addition to the DC Animated Universe (DCAU) line of direct-to-DVD animated features. Based on Grant Morrison's JLA: Earth 2 graphic novel, the action brings the core Leaguers (Superman, Wonder Woman, The Flash, Green Lantern, and Martian Manhunter, though not the Dark Knight, who stays behind to ruminate on the evils of his own world) to a second Earth where their villainous counterparts rule the roost as part of the Crime Syndicate.