Feature-length animated adventure set in a Lego version of the DC universe. When Superman (voice of Nolan North) decides he can no longer contain his evil mirror image Bizarro (also North) in Metropolis he decides to send him back to his home planet. Once there the destructive clone forms his own rival group of superheroes to fight back. But when Darkseid (Tony Todd) threatens Bizarro's planet and the entire galaxy Superman and the rest of the Justice League, including Batman (Troy Baker), Green Lantern (Diedrich Bader) and Wonder Woman (Kari Wahlgren), are forced to join forces with their polar opposites in the newly formed Bizarro League to defeat Darkseid and restore order to their universe.

When a young adventurer named Milo Thatch uncovers an old journal containing clues to the whereabouts of the sunken city of Atlantis, he wastes no time in putting together an expedition and setting off in search of the maritime metropolis. Heading deeper and deeper in their submarine, Milo and his crew brave many dangerous experiences, including a confrontation with a giant lobster, and are overjoyed when they finally find the underwater kingdom. However, after they reach their goal, it's not long before they discover a plot to seize all the power and riches it has to offer, and soon find themselves becoming the unlikely defenders of the lost civilisation.