The Overmind's goal is to assimilate the Protoss into the Swarm to create something perfect. Still, she does make a superb villain in Brood War so it all worked out well. I have vague recollection that Kerrigan was somewhat late addition to the game, explaining this issue. The only thing she does is to chase Protoss on Char, yet her powers do not actually contribute to the war against the Protoss. And this is visible in the story, as the Overmind claims Kerrigan is a key to the Zerg victory yet nothing in the campaign really indicates this is the case. Blizzard wanted a human viewpoint for the Zerg campaign. Kerrigan is a creation of the first point actually. Starcraft 2 has motiveless wars fought for unclear reasons, and there's a random space-god. Starcraft story is one where humans end up in a middle of an ancient and epic scale conflict. I'm still waiting for the true SCII's story. Well, Amon and the Hybrids actually were the real enemies in the overall plot, but only in Legacy of the Void they got that treatment. Brood War set of events made clear that Kerrigan and the Hybrids bred by Duran were the enemies in SCII, not Mengsk. He was the enemy in both Wings of Liberty and Heart of the Swarm. But Blizzard treat him like the foe to be dealt with.

What annoyed me is how much importance Mengsk got in SCII's plot, after how bad his ass got kicked in Brood War. Samir Duran, one the most mischievous characters from Brood War, and one of the biggest prospects plots for SCII's story barely had any appearence in the final run, and when it did, barely ressembled the Brood War personality at all.

How they managed to ruin Kerrigan character is simply unbelievable. Can't believe how bad Blizzard managed to fuck up the way they did. Playing Starcraft Brood War campaign again makes me sad about how bad, cheesy and embarassing SCII's story was.

Starcraft remastered campaign