I thought for sure Tychus was gonna off her. Because it would be an interesting plot twist (after seeing the end of the protoss), to see how they all fight the Xel'Naga or the Void Monster or the Hybrids or whatever the hell, even with her dead. I expected Zeratul would warn Raynor, and just at the last second when all is well and good and seems promising, she bites it anyway. Tychus was also built up for the whole game as the backstabbing infiltrator, so for such an entire-game buildup, I sure didn't see it not panning out.

On the other hand I do get it. When you take control of the Zerg in the next expansion, it'd be hard to sell the game if Kerrigan remained who she was (and who the hell would lead the Zerg if she died in Wings). No goals that offer anything tangible that the player can relate to, just some female monster roaming about. Assuming she's with the Terrans now, playing as the Zerg allied with Terrans or something similar would make the story more involving. The "HO HO HO I AM THE QUEEN BITCH OF THE UNIVERSE" got old in Brood War.

You could see Tychus betrayal coming a mile away,
but I figured it would evolve in to an epic last minute struggle
between weighing his own personal survival versus his loyalty to his friend
and in turn he would end up deciding to sacrifice his life and save everyone
going out in a blaze of apocalyptic fury (as was his personality)

I think that flashing light from his HUD mean that he was gonna get shut down any damned way. I mean really, did you think Mengsk was just gonna let stuff slide? Newp. I think Tycus knew this, and decided to go out fightin. Better to die like you lived... On a second and totally unrelated note, Gen. Warfield is the baddest ass mofo I have ever seen. When the bayonet came out, I was reminded of a scene in the beginning of Macross Plus. Then he had his arm lopped off to be replaced with... for lack of a better term, Megatron's Fusion Cannon?! He gets my vote for baddest black dude. Sorry Sgt Johnson.