This review covers my thoughts on both Annihilation: Conquest volumes, so there may be some discussion of Book One mixed in.
I read Annihilation: Conquest when it came out in singles back in the day, and, even then, I didn't think it was a great followup to Annihilation. Today, after reading the two-volume collected edition, I contend that Annihilation: Conquest just wasn't very good at all. There were some bright spots, like Keith Giffen's Star-Lord miniseries and the Nova tie-ins, and Tom Raney's art is top notch, but over all, this story just isn't well executed. It's not that the Phalanx, having been upgraded by Ultron into Matrix clones sealing off the Kree Empire and taking over all technology within it wasn't a good concept, but it didn't really try to explore it. Like, at all. Annihilation had a lot of depth, a lot of consequence, and a lot of character growth within it, but Conquest felt like it was just checking off boxes.
Anyway, here are some of my thoughts in no particular order:
-I did like how Abnett & Lanning seemed to bring more Marvel Cosmic toys to the toybox, with cameos by the Spaceknights, the Technarchy, and other characters that were mostly left out of Annihilation. But there was so little character work that it, again, felt like checking boxes.
-It stretches credulity a bit that Peter Quill, a character with extensive cybernetic enhancements at the beginning of the story, escaped Ground Zero of the Phalanx invasion, an invasion made possible by an aggressive virus that takes control of technology, without being corrupted or killed. I mean, I'm glad he did, because I really enjoy Giffen's and D&A's take on Star-Lord, but, come on.
-Everyone seems to hate Phyla Vell. Like, not the fans or the in-story characters so much. The writers. She comes off as whiny, inept, and barely able to keep up without someone holding her hand the entire time. (I feel like this theme followed through in D&A's Guardians of the Galaxy series following Conquest, where she was repeatedly embarrassed and finally unceremoniously murdered.)
-Yeah, the Phalanx were totally the Matrix robots with the serial numbers filed off. I don't care so much, because the aesthetics were good, but, again, come on.
-Was there a bigger waste of time than Wraith? The miniseries, despite feeling like a rough draft, did have some interesting concepts and a nice Spaghetti Western vibe. Then his part in Conquest amounted to hanging around with Ronan while Ronan stepped on rakes until Wraith happened to be at the right place for the Killing Blow. Then, to the best of my knowledge, Wraith was never seen again.
-Adam Warlock annoys me most of the time. Teenage Angst Adam Warlock took a character I already don't like and turned him into absolutely the worst.
-I would think a character like the High Evolutionary wouldn't keep getting caught with his pants down. Again, I don't really like the guy that much, but would he really be so out of it that he doesn't even pay attention to massive political changes up to and including the death of the Supreme Intelligence, who, you know, fucking hired him?
-Actually, Ultron being the power behind the Phalanx was a good idea. But Ultron is so one-note that the novelty wears off pretty quickly. Ultron and the Phalanx are two Marvel entities that are universal threats that need to be completely eradicated to be stopped, but, somehow, never are, quite.
-So, the main miniseries amounts to a lot of people running around and not doing anything until they all happen to be at the right place at the right time and then they destroy the Giant Robot. There is some good character work with the Guardians of the Galaxy, some bad character work with Phyla and Ronan, and way too much fapping over Adam Warlock hitting Space Puberty. And the guy who used to be Captain Universe gets a gristly death.
-Groot could actually speak words in Annihilation Conquest. His limited vocabulary is a product of Guardians of the Galaxy, which came directly after. The inconsistency between the series annoyed me, since he lost the means to say anything other than "I am Groot" without any explanation and it wasn't addressed in any meaningful fashion until War of Kings. I actually prefer the movie compromise where Rocket, at least could translate.
-Upon rereading this, Mantis might be my favorite. I love how she is operating on a cognitive level that is out of step with rest of her team, and while it saves them in the end it is still kind of infuriating to everyone who interacts with her. I didn't read any of the Celestial Madonna stuff, but it makes sense that if that is what she is, she wouldn't be on the same tracks as the rest of the cast. (She is, to me, far superior to the movie version, at least as of this writing.)
The biggest letdown to me about this whole thing was how weak the worldbuilding was. And, not just compared to Annihilation. Abnett & Lanning's Legion was filled with big ideas and characterization, and Nova at the time was shaping up to be the same. This just felt thrown together so we could have a big cosmic sequel. I think they got better, but Annihilation: Conquest needed like six more months of prep time and a lot more focus on character. They got better, I think, but Conquest was a swing and a miss.