The person in the poster is notably not any of the crew, and is suspected to be the villain … a character as yet unidentified. Some speculation is that they are wasting no time, and that Khan will be the villain. Another suggestion is that the next film will be based on the second pilot episode (“Where No Man Has Gone Before“), and that the antagonist will be Gary Mitchell, a Starfleet officer and close friend of Kirk’s who develops godlike powers while losing touch with his humanity (an even more dangerous and more clothed version of Dr. Manhattan). Kirk is then forced to find a way to kill his friend; a friend who is becoming more and more difficult to actually kill.
Two photos released from the set:
At least you know where I will be on May 17!