This book is one reason why I wait for the collected editions of comics so I can read the entire story in one go. Last Son was so beset with delays, mostly from artist Adam Kubert, that DC had to put it on hiatus for four issues while Kubert got his groove back. In the end the story had to be wrapped up in an Annual.
Geoff Johns and his old Hollywood boss Richard Donner were probably thinking, "Hey, Hollywood! This is how you give Superman a "son"!" when they wrote Last Son. They decided to bring General Zod, Ursa and Non from the Christopher Reeve Superman movie into Superman comic continuity when Superman finds a shuttle with a young boy in it and is shocked to discover that he's a Kryptonian. Before Clark and Lois can pass the boy off as a relative, the boy's real parents arrive on Earth: He is actually the spawn of Zod and Ursa but unlike his parents, he's not a megalomaniac bent on world domination. Yet.
Superman has to team up with Luthor to defeat the escapees from the Phantom Zone and downtown Metropolis gets destroyed yet again in the ensuing battle. Oh, multi-coloured Kryptonites are also introduced here. Or is that re-introduced? I'm not up to par with my Superman mythos, sorry.
One of the issues collected here (the Phantom Zone issue) is in 3D and glasses are provided. My first experience with 3D in comics was a Batman graphic novel back in the 80s and the effect in Last Son is the same as it was for me when I read that 3D Batman book: bloody annoying. Oh sure, it looks nice with all the "special effects" but ultimately pointless.
I honestly thought the story would end with Lois and Clark adopting "Christopher" so the poignant ending...so not expected. I'm one of those people who hates it when a junior version of a superhero is introduced in my pop culture but Last Son works mainly because it did not end happily ever after. But I'm pretty sure we'll be seeing Christopher Kent again in the not too distant future*.
Good job by Johns, Donner and Adam Kubert.
*Or then again, maybe not.