Five years from now, the DC Universe is reeling from a war with another Earth, leaving the world unprepared for an approaching evil that threatens to destroy the future. As heroes are turned into mindless villains, the planet as we know it is no more. The only salvation lies in the past, where this future apocalypse must be averted. Can a time-traveling Batman Beyond help a massive cast of the DCU's finest avert the impending apocalypse in these stories from issues #0-17 of the new weekly series?