Plot
Reminded by the Fortress of Solitude's AI (in the guise of his Kryptonian father Jor-El) that, despite his appearance, he is not human, Superman heads back to the Daily Planet when people panic as a strange meteor is about to crash. He stops it, and sees that it's a pod ship carrying a little boy. Sarge Steel of the Department of Metahuman Affairs meets with Superman about the boy, whom he learns is Kryptonian. Superman takes a personal interest in the child, and is concerned over what the government might do to him. His concerns are proved justified when the boy is transferred without Superman's knowledge. Enraged, Superman disguises himself to grab the boy from a moving van and goes to the Kent Farm in Smallville, Kansas.
With no answers on the boy from the Fortress, Clark talks to Lois about adopting him, but she feels uncomfortable given who and what they are. The boy then speaks English as news breaks out on the young Kryptonian's disappearance. Lex Luthor hears the news and wants Bizarro to grab him. At a press conference, where Superman announces that Clark Kent and Lois Lane will take care of the Kryptonian child, Bizarro arrives and attacks him. The fight threatens the city around the conference location, and Superman finally uses super-breath to throw him away. Lois and Clark walk with their adopted child, named Chris Kent, as three more pods land near the Fortress carrying Phantom Zone criminals: General Zod, Ursa and Non.
As the three enter the Fortress, Zod activates the A.I. and is angered by the information it holds on him: he is called everything, including "madman". As Lois and Clark bring Chris to the Daily Planet, it is attacked, and Clark quickly changes as Non grabs him and throws him out the window where he meets Zod. Meanwhile, Lois tries to escape with Chris until Ursa stops her to grab the child, revealing him to be her and Zod's son, Lor-Zod. As Superman fights Zod, dozens of pods rain from the sky, opened to reveal Phantom Zone villains. Scientist Jax-Ur emerges with a Phantom Zone Projector and sends Superman to the Zone.
Trapped, Superman witnesses the Kryptonian invasion, and he can't do anything to stop it. Mon-El, whom Clark sent to the Zone when he was younger to preserve his life from fatal lead poisoning, appears before him. Bringing Superman to Fort Rozz, a former prison, he is shown one of the last remaining pods he can use to return home, but prisoner Dev-Em attacks Superman, nearly killing him, until he is slammed into the wall by Mon-El. Using the pod, Superman returns from the Zone to Metropolis, where the city is now enslaved and the buildings transforming into Sunstone structures. He turns to Luthor for help against the criminals when he is attacked by Bizarro, Parasite and Metallo. There, Luthor tells Superman that the Man of Steel will join his team: the Superman Revenge Squad, consisting of Luthor, Parasite, Bizarro, and Metallo.
Showing off his sufficiently advanced weaponry that is easily capable of killing other Kryptonians, Superman asks Luthor why he is still alive. Luthor scoffs at him, saying he would much rather defeat Superman than have him become a martyr. As the squad moves out, Metallo uses various forms of Kryptonite to kill the Kryptonian outlaws. When using gold, a pair of the criminals fall out of the sky with a "splat". When using red, one criminal's DNA shifts irregularly, allowing Metallo to step on his head and crush it. Parasite takes pleasure in siphoning Kryptonian powers from many of the escapees. Bizarro goes toe-to-toe with Non, another mindless brute, as they exchange grunts and tests of strength. Luthor goes after Zod's main fortress, seeking to have the Phantom Zone forcefully "recall" all who had been inside of it. Speaking with Lois, she discovers that as a side-effect, Luthor intends to trap Superman within the Zone along with all of the escaped criminals.
Superman goes straight for Zod and Ursa, taking Chris out of harm's way. During their fight, Zod tries to tell Kal-El that his father had failed him, with Superman saying that his father gave him life. Hearing much of the argument, Chris flies toward the battle as a distraction as Luthor initiates the recall. Before the Zone can trap Superman, Lois knocks Luthor out with a giant crystal. In the midst of the sweeping storm, Chris realizes that he is keeping the Zone open and must return in order to close it. Superman appeals to him to find another way, but Chris persists, and thanks both him and Lois for all that they had showed him. Superman flies after him, but is unable to stop him from re-entering the Phantom Zone.
Back in the Fortress, Superman asks Mon-El if he has found Chris; he has not. He says: "I will not stop looking", and flies back into the zone to continue his search. As Mon-El is floating away, Superman looks into the Phantom Zone at his friend and simply says: "Thank you".
Continuity
"Last Son" is the first appearance of General Zod, Ursa, and Non in their post- Infinite Crisis incarnations. [2] All three are influenced by the characters' appearance in the films Superman and Superman II . Since Crisis on Infinite Earths , there have been several characters bearing the name of Zod in the Superman comics. However, in current continuity, Superman meets the true Zod for the first time in "Last Son".
In Action Comics Annual #10, Clark Kent's life as a child in Smallville is shown in detail for current continuity. Also, in this issue, continuity returns to having multiple versions of kryptonite, after it had previously been decided to do away with all but the green variety during the Crisis on Infinite Earths storyline.
Chris' fate at the end of the story creates a continuity paradox. Due to the delays in the completion of the story, Chris Kent's appearances in the Superman title during the interim time between "Last Son"'s fourth and fifth parts appeared to take place after "Last Son". This would be impossible, however, since Chris returned to the Phantom Zone at the conclusion of the story. Due to the pronounced scheduling problems with the arc, a line of dialogue was incorporated into Action Comics Annual #11 ("I even got to meet Robin") that insinuates that the invasion of Zod's army took place after Chris received his power-dampening wristwatch, which would place the events of Superman #664, 668, and 673 chronologically before those of Action Comics #846 despite the fact that the latter was released earlier.
Chris Kent's fate was unknown until Action Comics #875, where it was revealed that he is the new Nightwing after the events of "New Krypton".
