Suicide Squad: Kill the Justice League pits Harley Quinn, Deadshot, Captain Boomerang, and King Shark against a slew of Brainiac minions, as well as the Justice League itself. Lacking any sort of context for when Brainiac’s invasion began, Suicide Squad: Kill the Justice League seemingly drops Task Force X into Metropolis as a final effort to dispatch the League, whose members are being mind-controlled.