Black Canary convinces Green Arrow to help save her mentor, Wildcat, from his involvement in an underground, super-powered fight club known as MetaBrawl.
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.
Cadmus has recruited a team of supervillains named Task Force X (based on the comics' Suicide Squad) made up of Deadshot, Plastique, Captain Boomerang, and the Clock King. Their mission: steal the Annihilator armor from the Watchtower.
Seeking to avenge the death of her parents, the Huntress enlists the help of the Question in tracking down Steven Mandragora, a mobster in protective custody -- and being guarded by the Green Arrow and Black Canary.
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.