Board Thread:Mortal Kombat X/@comment-4809082-20150302163157/@comment-26082987-20150406033432

Hope no one minds me offering my own theories on this.

1. Ozymandias (from Watchmen) Gambit Theory: The main antagonist will be someone who is among the protagonists for the duration of the game and isn't revealed as being behind some cruel unethical, but also well-intended, utilitarian, scheme until near the end when he/she is exposed. Possibly as a separate and unplayable version of a character already on the roster.

2. Mystery Woman Theory: The mysterious woman featured in Jade's MK9 Arcade Ladder ending uses Jade's corpse (the terms of Shao Kahn's and Quan Chi's deal only pertained to souls, so bodies might be exempt) as a vessel to retaliate against both Shinnok and Raiden for their respective tamperings of the timeline.

3. Skarlet Mutation Theory: Skarlet, by absorbing the blood of various gods, demons, dragons, and sorcerers turns into a Lovecraftian eldritch abomination seeking to consume everything in existence to sustain its hunger.

4. Smoke the Enera: (SPOILER (MAJOR OR MINOR UNKNOWN AT THIS POINT) REGARDING THE FIRST CHAPTER OF THE STORYMODE SKIP TO 5. IF YOU WISH NOT TO BE SPOILED) When he is encountered for the first time he says "Smoke is dead. I am Enera" which seems to hint at a higher degree of independence than the other of Quan Chi's servants. Perhaps Quan Chi's spell had an unforeseen interaction with his part Enera biological structure and now the Enera, no longer bond by Tomas Vroba's control, now seeks to pursue its own goals. (SPOILER END)

5. Dark Kahn Canonized: Perhap the surprise Big Bad of MKX will be Dark Kahn from the non-canon MKvsDC, but with a different back story. Also, someone on TV tropes has mention that what appears to be a giant version of Meat in the background of one stage. Considering that Quan Chi's MK9 ending had him resurrect Shao Kahn to serve him as one of his servants and then something goes awry resulting in the creation of Dark Kahn.

6. Noob Saibot-Prophet of Doom?: Just as Noob Saibot's ending in MK3 foreshadowed Shinnok's appearance in MK4, perhaps this time a character featured in Noob's MK9 ending, Havik, will be the Big Bad. Heck, Noob could be the villain himself considering that a little over week to go as of this writing and nothing has been said about him.

7. Sinners in the Hands of an angry Thunder God: Dark Raiden, but as a separate unplayable boss, who in the story is perhaps the result of Raiden being corrupted in some way.

8. Chameleon the Ultimate Lifeform: While it has been deconfirmed that he won't be a part of the roster, their hasn't been anything said about him not being a non-playable boss. Perhaps Chameleon will be revamped into some sort of Cell (from Dragon Ball series)-like individual who seeks to assimilate as many other warriors and/or fighting styles as possible to become the most powerful warrior possible.