Just to Finalise the MKD they are

Mileena
Baraka
Scorpion
Sub-Zero
Nightwolf
Noob Saibot
Ermac
and from what heard that Rayden/Kung Lao looking character is a Goddess of water,If you look closly the character has boobs and long hair not a sash.

I think we can Expect...
Kitana(thats a gimme after all mileena is her sister)
The Dragon KIng(duh, Reptile is him Now)
Sonya Blade
A Vampire Warrior(maybe not nitara)
Liu Kang (in one way or another)
Johnny Cage
Blaze(I strongly belive the elders will make him the god of fire)
Dramin(Altered from the chamber)
and some newbies like a Red Dragon member