While Superman visits the bottled city of Kandor, Brainiac attacks the Fortress of Solitude in hopes of reclaiming the Kryptonian city. With no one else available, The Atom commandeers one of the Superman Robots to fight the super genius.
The Justice League is back, 'with lightning-paced action and heroics'. This show will be including everyone: Superman. Batman, Wonder Woman, Hawkman, Green Arrow, Zatanna, Shazam, the Flash, Blue Beetle, Plastic man, Martian Manhunter, Lobo, Zatanna, the Demon, Dr. Fate and fan favorites like Harley Quinn and many more. Justice League Action, will also reunite the Batman Animated Series voice talents of Kevin Conroy as the Batman and Mark Hamill as the Joker.