its gonna be liu kang, boon said we will be surprised, will every one be surprised if its shinnok like some people are saying, no we wont be surprised, we will be if its kang.
Or Johnny Cage considering his MK9 ending.
Johnny and Sonya had a kid, so I doubt it.
That never stopped NRS from putting similar characters in the same game (cough*Frost*cough).
Also Ed Boon said that there would be "aged characters" in the PlayStation stream, and he even let it slip about Cassie Cage doing fatalities on family members in MK X, in the GiantBomb video (start at the 4:10 mark).
50 year old Johnny or Sonya isn't out of the realm of possibility.
Or Johnny Cage considering his MK9 ending.
Just guessing by the timeline, Cassie was probably conceived during the events of MK 2011. By the end of MKX 25 years have past. That's plenty of time for Johnny Cage to go nuts and be turned evil by his newfound powers. I think Johnny Cage as the big bad is not out of the realm of possibility, but I still think it will be Liu Kang.
Generally speaking, I'd actually want a female boss this time but I don't see it happening in this game for some reason.
Since the story takes place over 25 years after MK9, the final boss could be Shao Kahn.