Things go very wrong when the legion of Doom comes to the public, and the Earth's Guardians; Superman, Batman, The Flash, Green Lantern, Wonder Woman and Green Arrow, along with new comers Aquaman, Mera, Hawkman, Hawkgirl, Blue beetle and Zatanna are put to the ultimate test. The Justice League must stop the evil Brainiac, along with Lex Luthor, Joker, Black Adam, Cheetah, Reverse Flash and Black Manta from the past from executing his terrible plan, which threatens the fate of humanity.
