Warning! Spoilers ahead for Dark Nights: Death Metal #4
In a last-ditch effort to save the Multiverse from Perpetua and the Batman Who Laughs, Wonder Woman comes up with a plan with Earth's remaining heroes to restore their world and lives as they once were before Dark Nights: Death Metal. However, their mission is not an easy one, involving multiple teams that have to perfectly succeed at just the right time. Of course, things start to spiral out of control, and dangerous elements the heroes couldn't have accounted for come to light, resulting in the entire fate of the Multiverse resting in the hands of Diana's ability to redeem one of DC's worst and most terrible villains of all time: Superboy-Prime.
Superboy-Prime was created by Elliot S Maggin and Curt Swan in 1985, living on Earth-Prime. In his world, he was the only superhero while all others were works of fiction. However, after Crisis on Infinite Earths and the destruction of his Earth by the Anti-Monitor, Superboy-Prime was alone in the Multiverse until he became trapped in a paradise dimension with Alexander Luthor of Earth-3, as well as the Superman and Lois of Earth-2. However, due to the manipulations of Luthor in Infinite Crisis, Prime's morals became corrupted over time, turning him into a twisted and dark version of who he once was, becoming violent, psychotic, and sadistic as well (though still believing that it was his destiny to become Superman.) Ironically, one of Superboy-Prime's biggest angers is that he believes the heroes of the new post-Crisis on Infinite Earths act more like super-villains.
Now, in Death Metal #4 from Scott Snyder and Greg Capullo, Wonder Woman has to change Prime's mind. While the Green Lanterns are seeking to destroy Perpetua's antennae and save the Earths that still remain, the Speedsters are protecting Wally West as he races to the Mobius Chair so he might use the anti-crisis energy to restore the Multiverse as it was. However, in order to do that, they have to receive said energy from the Trinity, who have traveled to the three worlds that are forever engaged in the three major crises of DC Comics... or so they thought. Once they get there, they realize that the worlds are actually those in which the three major crises were lost. For Diana, this means she's on the world where Superboy-Prime wins Infinite Crisis, revealing that the Batman Who Laughs (now the Darkest Knight) has agreed to let Prime have one world where heroes still exist in their purer and original form from the Golden Age, provided that Prime aids him in taking down the Trinity.
Wonder Woman tells Prime that while the heroes of Earth have indeed changed, that that's not a bad thing. Change is a constant, and the heroes aren't who they used to be because the world itself isn't what it used to be. She tells Prime that the world he envisions is possible, but it can't be the only one. It needs to be part of the bigger system of the Multiverse, with each Earth carrying its own unique brand of life and change along with it. When Prime says that restoring the Multiverse would all be a shot in the dark, and that there'd be no guarantee that another world wouldn't rise to destroy them, Wonder Woman counters by asking: isn't Superman himself just a shot in the dark? She's completely right, as Superman is the embodiment of hope, fighting for what's right and the hope for a better tomorrow.
Thankfully, Diana's words get through to Prime, and he doesn't destroy the boxes containing the anti-crisis energy. Instead, he fires their energy at Wally, allowing him to receive the power instead... or so they think. In reality, the Darkest Knight had reprogrammed the Mobius Chair to direct all of the power to him, leaving the heroes worse off than they were before. With not a lot of hope to spare, the positive is that Superboy-Prime has seemingly been redeemed by Wonder Woman, joining them in their fight and finally returning to the light as a DC hero of the Multiverse once more. This is really exciting, as it seems doubtful that any DC fan would have thought that this would ever happen, so it's certainly a welcome surprise from Snyder and Capullo's recent issue of Death Metal.