I'm going to rage if that suit never comes. I mean, it has to ... doesn't it?
The PSP can keep their other 14 new skins; I'll pay damn near any price for a sexy Rain alternate costume (true alternate hopefully without a ponytail and perhaps wearing that sweet cape from MK: Armageddon) and his UMK3 ninja suit. That's it. They can keep whoever elses; I likely won't use them unless it's UMK3 Ermac, Robert Englund Freddy, a Johnny Cage alternate (MK1?) or a true UMK3 Jax (<-- You know it'd be rad).
But my guesses for what the other 15 alternates are besides Rain's UMK3 suit are ...
UMK3 Sub-Zero (Masked)
UMK3 Scorpion
UMK3 Ermac
UMK3 Reptile
UMK3 Smoke
UMK3 Rain
UMK3 Noob Saibot
Alternate Cyber Sub Zero
Alternate Kenshi
Alternate Skarlet
Alternate Rain
Alternate Freddy (Perhaps when he wasn't so burnt up)
MK2 Mileena
MK2 Skarlet
MK3 Skarlet
... uh another alternate for Rain? Do it!!