Big changes at Supercorp mean the ascent of Mercy Graves as the new CEO! Lex's confidant is now calling the shots and rebelling against her Super-boss... but what does the Man of Steel have to say about all this? Plus, Superwoman and the Justice League devise a plan to put Doomsday under lock and key forever... but it will take a risky arms deal with an alien race to do it! The road to Superman #25 marches headlong into this penultimate chapter in the Many Deaths of Doomsday saga!