Superman battles Doomsday in the heart of a volcano. Doomsday is revealed to be a modified clone of Superman. Batman probes the Cadmus conspiracy to destroy the Justice League.

The Question, fearing disaster, decides to kill Lex Luthor to avert it.

While the senior Leaguers struggle to respond to the mysterious main gun firing, Amanda Waller orders Galatea to lead a full attack on the Justice League.

Green Arrow must lead a team of non-powered superheroes against a berserk super-soldier attacking Metropolis.