As Superman stands over Kara’s ashes, Darkseid prepares to leave. As he moves toward the boom tube, he mocks Superman by reminding him that he is once again the last son of Krypton, and saying that Kara’s death is his fault. Unable to bear it anymore, Superman attacks Darkseid, punching him clear across the Kent farm and into the barn. As Superman attacks Darkseid, he decries him for talking about Kara like he knew her. Darkseid fires his Omega Beams at Superman, but Wonder Woman dives in, deflecting the blasts back at Darkseid with her bracelets. However, Superman throws her out of the barn, saying that this is between him and Darkseid.
As Superman carries Darkseid out of the atmosphere while fighting him, he talks about the simple things in life that Kara will never experience, things Darkseid does not care for, why he only knows death. Darkseid believes it’s made him a god, but Superman retorts it’s made him vulnerable. While they fight, they begin orbiting the sun, and a powered-up and berserk Superman manages to injure Darkseid enough to make him bleed. Dragging him out of orbit, Superman activates a boom tube and takes Darkseid to the Source Wall, imprisoning him within it, saying that Darkseid belongs with all the other failures in the universe.
Heading back to the Kent farm, he finds the Justice League helping repair the damage. The Martian Manhunter, repairing the house, reassures Superman that his parents were in town, while Flash, repairing the barn, tells Superman they owe him this much. Wonder Woman asks about Darkseid, but Superman tells her that he’ll never bother them again. Heading to Paradise Island, Superman enters a hidden room where he informs one last person–Kara Zor-El. The whole event of flying cross county was to deliberately provoke Darkseid into an attack, and make him believe that he had killed Kara (in fact, Wonder Woman had teleported Kara out of the beam’s path and teleported in ashes). Superman reassures her that no matter what she decides, he will be there for her.
At the Fortress of Solitude, Superman and Batman talk about what happened. Superman admits that he had become so overprotective of Kara that he was denying her a chance to live her life, and also apologizes to Batman about the remark regarding Jason Todd. Batman says that it’s forgotten, and admits that this situation is more like what happened with him and Dick Grayson after he became Nightwing. As they speak, Kara shows up, saying that she has made a decision.
At Paradise Island, Superman introduces the superhero community to Kara, who is now Supergirl. She admits that she isn’t sure she earned the right to wear the costume, but that with their help, she’ll grow into it. Superman privately reflects that he’ll never be alone again thanks to her, while Batman privately reflects, for Superman’s sake, he’ll put aside his suspicions regarding Kara… for now.