There are many people posting predictions, so I thought I would post what, in my opinion, is a logical prediction. (No, I am not demeaning anyone's opinions, nor am I stating that anyone else is wrong or that I am right.) (Also, I did not "choose" any of these because I like them more than anyone else, I actually did use reasonable deduction and logical thinking, so if you want to know how/why I chose who I did, just ask.)

Predictions for playable Kombantants.
Baraka
Cyrax*
Goro
Jax
Johnny Cage (confirmed)
Kabal
Kano
Kitana
Kung Lao (confirmed)
Liu Kang
Mileena (confirmed)
Noob**
Nightwolf (confirmed)
Raiden (confirmed)
Reptile (confirmed)
Scorpion (confirmed)
Sektor* (confirmed)
Shang Tsung (confirmed)
Shao Kahn
Sheeva
Sindel
Smoke*
Sonya
Stryker
Sub-Zero**/*** (confirmed as the original Sub-Zero)
*I believe the cybernetic ninjas will/should have an alternate (if not as their primary) costume of them before they were transformed from human Lin Kuei to cyborgs.
**Although I highly doubt that they will have both Sub-Zero (the original Sub-Zero) and Noob as two playable characters, I still put Noob in my list. They may do something with giving Sub-Zero an alternate costume of Noob, since in the first game there weren't any different fighting styles, that option may be viable.
***I also doubt, although it also could be a possibility, that they will have two Sub-Zeros in one game (the original that is already confirmed and his younger brother). Although both the Noob as a playable character and having two Sub-Zeros as playable characters seems unlikely, as I've explained. I have a feeling since they are aiming for 26 characters, either one or the other will be true (based upon my prediction list.)