Seeing as I'm new here (and didn't know if this was posted before or not), I was waiting for this poll to finally come up. My top three from MK4 are Reiko, Fujin, and Shinnok. I'm voting for Fujin, but if any of those three make it then I'll be happy. I never really liked Kai. He seemed like a lesser Lui Kang. I didn't expect him to get much love here.
I also kinda hope they don't put Shinnok in, only so they could make him make a triumphant return in a later game... That's my hope at least.