This one shot sets the scene for the forthcoming new Justice League series. The league has lost Superman but a pre-flashpoint version of the Man of Steel has been living with his wife, Lois Lane, and his child Jon, in secret. The story continues in Justice League #1.
Still reeling from the death of their Superman, the Justice League is aided by the Superman from another universe in defeating a “reaper,” a techno-organic being sent to begin the harvesting of Earth. Along with two newly-assigned Green Lanterns, they repel the reaper and send a warning to others that Earth is protected by the Justice League.