In Superman Legacy, Clark faces off against the powerful and malevolent Brainiac, a technologically advanced alien intelligence, sets his sights on Earth, seeking to conquer and enslave humanity. With his vast intellect and an army of deadly drones, Brainiac begins to assimilate cities and ancient civilizations, threatening the very existence of mankind. With the help of a green lantern and a few hero friends, Superman will establish his legacy as a savior of earth.