davejames, fyi, Zod was in the scout ship with the birth pods that crashed away from the singularity which is how he escaped. When I saw the movie, I remember thinking, oh no, are they going to continue the Zod story in the sequel because he went down with that ship and didn't get caught in the singularity. LOL, guess not.
Ah, you're right. Forgot about that. So I guess his surviving wasn't implausible at all.
Although I do think they should have done a better job explaining what Zod was up to at the end of the movie. First time I saw it, I wasn't really clear where this Genesis Chamber was, or who was flying off with the scout ship, or why it was being taken into battle, etc.