How about, he walks up to his dazed opponent and opens his hand just below their chin. He then shoots his spear up in to their head. It pops up through the top of their head and you see a close up of the characters eyes roll back (if they have eyes). He then grabs the top of their head and pulls their brain down through the hole in their chin before kicking the opponent to the ground.

For his victory pose, the brain bursts in to flames and he shoots hits spear at the camera. Burnt brain matter splatters against the screen, cracking it before the pieces slowly ooze down.

reptile tongue dance - reptile turns invisible, cloaked in camo crawls onto his back and spins around and around. he spits his acid onto the fighters face melting and blinding them. you then see a tongue stick out onto the screen cutting the fighters legs of. the opponnet crawls trying to get away. reptile uncloaks himself and walks over sticks his tongue out again latching onto there neck swallowing there head. does cool pose and hisses at the screen. fatality,reptile wins flawless victory.

I got like the best one. How about Quan Chi makes the opponent's neck very long? Oh wait.

For Havik: He first turns the opponent. He bends the opponent's back until it breaks (like Dairou's Hara Kiri). Then he puts his hands in the opponent's mouth and pulls on the flesh, ripping open the face and pulling off the scalp. Then he takes out his morning star and smashes the chest, causing the dead to explode.

Fatality.

How about Spawn making a cameo appearance.

His fatality would probably involve each of his many chains simultaneously ripping a limb from the enemy's body.

One for each arm, leg and a separate one for the head.

Also right as the limbs are severed, he blasts the enemy's heart out with a bolt of necroplasm.

Brutal.

Kung Lao- Wind Terror

Kung Lao throws his hat straight at the ground, and uses a Wind Teleport, his hat teleports too. He kicks the hat while behind the opponent, just right, so that it flies into the back of the opponent's head, landing there. Kung Lao walks forward and retrieves the hat from the corpse, pulling the head off with it.

KUNG LAO WINS
FATALITY