I wouldn't mind him as a zombie. I know everybody would be like "If he was a Zombie, how could he move fast"? Well since he was the MK Champion, and it is a game, he is an exception.

I think i can see him in 2 ways.

First since he hasn't been dead long. I can see him with bags or sunken in eyes. Blood shot eyes and a limpish neck kind of devilish. He would turn his head in weird ways and give you odd looks. Head bobbles a bit from time to time. His skin starting to turn pale green. You can tell he isn't his self.

Next the full on Zombie.

He is possessed. The walking dead. His spirit is not in his body. Under some sort of control. DK-QUAN CHI control. He is rotting away slowly with each confrontation. In battle everytime you land a good combo or strong uppercut, pieces of flesh go flying off. Maybe show some little maggots on him or crawling on the ground where the flesh had landed. after each round you retain the rotting corpse never to look better.

Not a bad idea for an endurance for Kang. Make it through the game without becoming MEAT. Pretty much means you have to remain untouchable for Lui's spirit to return to his body and be at peace.