Lois writes an expose revealing Superboy to be a clone and asking if all of the Supermen are fakes. Many see him as the real Superman, angering Luthor. Superboy and later Steel try to stop him, only to be defeated until the timely arrival of Cyborg Superman, who fights and drives away Eradicator. Suddenly, the conference is attacked by the Eradicator, who seeks to 'eradicate' Luthor.

There Lois learns from scientist Dabney Donovan that Superboy is a clone of Superman. Lois attends the conference, along with Steel, and sneaks inside one of the labs inside LexCorp. Lex Luthor holds a press conference introducing Superboy as the true Superman, sponsored and bankrolled by LexCorp. Lois Lane, still reeling from Clark's death, decides to investigate. Each one of them is different in their personalities and crime-fighting style compared to the original Man of Steel.

Six months following Superman's death after defeating Doomsday, four new versions of the hero appear: Superboy, Steel, The Eradicator and Cyborg Superman. In the end, only one will be able to proclaim himself the world's true Superman.

But the aftermath of Superman's death, and the subsequent disappearance of his body, leads to a new mystery – is Superman still alive? The question is further complicated when four new super-powered individuals – Steel, Cyborg Superman, Superboy and the Eradicator – emerge to proclaim themselves as the ultimate hero. Reign of the Supermen finds Earth's citizens – and the Man of Steel's heroic contemporaries – dealing with a world without Superman.

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