"The Superman these incredible heroes once knew is dead, leaving an older, wiser Man of Steel from a vanished universe to take up the fight against evil. Hal Jordan, the greatest of the Green Lanterns, has taken to the stars, entrusting his place in the League to his powerful but untested young proteges, Jessica Cruz and Simon Baz. Now the Justice League must get used to these new faces and learn to work as a team once more. But they'd better do it fast. They're about to confront the biggest threats they've ever faced, from godlike machines capable of converting all life on Earth into a weapon, to a humble hacker who's ready to hit them where it hurts most."--Provided by publisher.