JLA: The Obsidian Age

While investigating the ruins of Atlantis, the JLA learn that Aquaman, who they had presumed was dead, has in actuality been hurled 3,000 years into the past. Looking to save their missing comrade, Superman, Batman, Wonder Woman, Green Lantern, Flash, Martian Manhunter and Plastic Man mystically travel back in time and encounter a mysterious civilization called the Ancients. Now as the world's greatest heroes find themselves under attack and overpowered in the past, a new JLA, made up of Nightwing, Green Arrow, Atom, Hawkgirl, Firestorm, Major Disaster, and Jason Blood, emerge to protect the present and future.