A few moves I made up off the top of my head...

Sub-Zero: Ice Nova
Sub-Zero brings his fists to his sides and charges up his kori power then umleashes it in a violent explosion all around him. If the opponent is within range or doesn't block, they are frozen instantly.

Smoke: Tele-grab
Smoke shoots his hands into the ground and they come up from underneath the opponent, grabbing them by their head and slamming them into the ground.

Quan Chi: Skull Wall
If you've seen the opening to MKD, then you know what this is. Quan Chi creates a wall of skulls infront of him to protect himself from an oncoming attack for a short period of time.

Blaze: Fissure Flow
Blaze slams his fist into the ground, craking the ground open and letting loose a river of lava along the ground at his opponent. If the lave touches them, they become incinerated and stagger around helplessly for a few seconds to extinquish the flames

Kenshi: Telekenetic Shackles
This move is especially useful for combo freaks. Kenshi uses his hightened telekenetic abilites to freeze his opponent in motion, rendering them helpless for a few seconds. The opponent can be frozen mid attack, or in mid air during a jumo kick or after a pop-up.

Ermac: Mind Bender
Ermac uses his telekenetic power to mess with the opponent 's mind or in two player the opposing players controler. He shoots out a ball of green energy and if it hits, it completely dissorients the contorls, switching all of the functions to random buttons such as having Up on the thumbstick become Punch instead of Jump or Sidestep.

Cyrax: Aireal Mine
An offspring to Cyrax's mine throw with the exception that this mine is air borne instead of ground based. It is launched out like a normal mine except that it floats in the air and towards its opponent.

Scorpion: Spear Gouge:
Scorpion's trademark spear is used to a new effect with this move. Instead of shooting his spear directly at the opponent, Scorpion plants his hand on to the ground and launches it from underneath, it comes angled out of the ground, thrusting itself into the opponent's chest, then retreats back into the ground, slamming down the opponent and back into Scorpion's hand.

Kano: Dust Kick
Kano has never been an honorable fighter, we can all agree to that. This move illustrates that overwhelming fact. A simple move where Kano slides his foot across the ground and up into the air, releasing a cloud of dust into the opponent's eyes, blinding them for a quick second.

Kabal: Plasma Spray
Kabal uses an enromous amount of energy from his back-pack to dischage a spray of several plasma blasts from his mask at the opponent, kind of like Jax's Machine Gun in MKDA.

Sub-Zero:

Snowball-
Sub-Zero throws a ball of ice at his opponent, kind of like a snowball. It doesn't freeze them, it's just like any other projectile used only to inflict damage or to stop an attacking opponent.

Frozen Shield-
Sub-Zero temporarily freezes himself to defend against projectiles, kind of like Nightwolf's reflector move except it doesn't reflect the move back at the opponent, it just keeps Sub-Zero from being hit by the projectile.

Ice Clone Attack-
Sub-Zero creates an ice clone which can then be kicked or punched, causing it to slide quickly into the opponent's direction. If it is performed in mid-air, Sub-Zero can either kick or punch it, causing it to fall in the opponent's direction. Example: Sub-Zero backflips, performs an ice clone in mid-air, lands, jumps forward and jumpkicks ice clone, and the ice clone flies and hits the opponent, stunning them.

I would make up some more, but it's getting late and I'm tired!
LOL