I'm still doubtful that Harrison is actually Khan. I think he is more likely one of Khan's supermen, perhaps even Joachim, or possibly one of their descendants. I suspect Khan himself is waiting in the wings to be set up as the Big Bad for the third movie. It wouldn't surprise me at all if the much-discussed scene with the two figures exiting the chamber filled with cryo-tubes is actually the very last scene of the film.
Not that I'm actually predicting this, mind you, but what if all that stuff about Benicio Del Toro almost but not quite signing up to play the villain was just a red herring? What if he really did sign up to play the villain, just not in this
Then again, maybe Harrison is
Khan, but that pretty much requires abandoning all pretense that this timeline branched off from the original as recently as the incursion of the Narada
, which was admittedly hard to swallow in the first place. Who knows, maybe the timelines originally diverged all the way back in the Eugenics Wars. In fact, a pet theory of mine is that the nuTrek timeline is actually our
future where the Eugenics Wars never happened in the 1990s, if at all.
Guess we'll know soon enough.