If i recall correctly, which i dont, i think there was 6 in deadly alliance. so i would be happy with 6, but 12 couldnt hurt me either so long as one of them is either Sektor, Shao Kahn or Reptile.

The 6 more logical characters would be Shang Tsung, Quan Chi, Johnny Cage, Jax, Sonya and Kung Lao (Kitana could be too, but she's prisoner...), but if extra unlockable are non-canon characters, these can be whoever MK characters... if they exists really

Sektor+Reptile=me happy

hehe Cage Jax and Sonya... I'd sell my copy if those 3 were super unlockables. If there are 6 it better be Sektor, Reptile, Shang, Quan, Rain, and Movado I guess.