The world's finest heroes founded the Justice League in order to stop an alien invasion of Earth. During a criminal pursuit, Batman crosses paths with the arrogant intergalactic cop Green Lantern, and the unlikely duo uncovers an impending threat bigger and more deadly than anything the Earth has faced before. For the Earth to have a chance to survive, it will be a race to forge an uneasy alliance of its greatest super powers, including the Kryptonian alien, Superman; the Amazonian envoy, Wonder Woman; and the Scarlet Speedster, the Flash, Cyborg and teen super hero Shazam. Sean Astin and Michelle Monaghan provide voices for this DC animated cartoon.