I was playing MK:TE last night, and decided to read some of the profiles and whatnot, and Noob Saibot's says how was ordered by Kahn to destroy anything that posed a threat to his reign over Outworld. It mentioned that the new threat (Shang & Quan) would be a challenge, but the way it was worded suggests Kahn isn't actually dead, just MIA. Here's hoping they expand on this now that Noob is in MKD anyways.