News just broke that the Playstation 3 version of Mortal Kombat 9 will contain a playable guest character. Kratos, from God of War, will be ripping heads off alongside the typical MK warriors. The report mentions that he will not have any single player story mode content, but will be fully functioning in VS mode.
Liu Kang
Raiden
Shao Khan
Sonya
Cyrax
Scorpion
Sub Zero
Sektor
Reptile
Mileena
Jax
Kung Lao
Shang Tsung
Stryker
Kabal
Quan Chi
Kitana
Johnny Cage
Nightwolf
Ermac
Sindel
Noob
Smoke
Goro