I would seriously mark out for Kabal.
Or better yet, Havik.
If you're gonna do an MK character every set, don't do a predictable one.
Fuck Cage. Liu Kang. Sonya. Quan Chi. Whoever.
Pull out someone totally unexpected, but badass enough to not only sell and be appealing, but maybe act as a lead in to the eventual next MK project.
Havik would be perfect.
Yes, he's an MK character. But he's been gone so long, he's almost neutral territory.
He's the Cleric of Chaos, so there's no reason for him NOT to just appear out of fuck all nowhere.
And he would serve as a bridge between players whose first major game is IJ2 to lead them right into the lap of MK11, which given where the story, technology, etc. is leading, you'd have an already built in niche fanbase of neutral players jamming with a "neutral" character, who they'll then mark out even harder for when the T-rated gloves are off and he can go full mace fuck nuts.