The Martian Manhunter, last survivor of Mars; Superman, the super-powered last survivor of the planet Krypton; Batman, the Dark Knight Detective; Green Lantern, wielder of an alien Power Ring; The Flash, the Fastest Man Alive; Hawkgirl, Winged Wonder and policewoman from the planet Thanagar, and Wonder Woman, Princess of the Amazons. Earth's seven greatest heroes join forces to defend Earth against attacking aliens, sorcerors, super-villains, and any other threat that might arise as the Justice League. This graphic novel features the core members of the team commanding a new expanded roster of heroes brought together to deal with specific crises they are best suited to handling from their new satellite headquarters that orbits Earth.