Whoa... Imagine how frustrating it would be if Syfy hadn't renewed the show and we were left with that cliffhanger.
Once Brainiac was in the Fortress, I thought it was going to turn out to have been Zod's idea all along to lure him into the Phantom Zone. So I anticipated what the solution was, but not who was behind it. I guess it did have to be Seg who saved the day -- although in so doing, he may have lost the future. We've gone from a timeline where Krypton would live on peacefully for another 200 years and leave Superman as its legacy to one where it's conquered by General Zod in a single month and on the verge of becoming a galactic menace.
I don't get how the temporal logic plays out, though. How does Superman's cape get restored by Seg being lost in the Phantom Zone? There's no way he'd even be conceived without his grandfather around to produce his father. Unless it turns out that the fetus Kor-Vex gets renamed Jor-El.
And did Adam get sucked into the future? It looked like he was on Earth, and an Earth that had been conquered by Zod, so it must be in the future -- but he was in one of Brainiac's bottle cities, and Brainiac was defeated in the present. So does Zod end up using Brainiac's ship and its bottle technology for his own conquests?
And what was the deal with that whole business about Nyssa turning out to be a clone? That was a weird digression that didn't seem to have anything to do with the story. I guess it's setting up a season 2 arc, but it felt like an intrusion here.