We now Harrison is working for Starfleet so if he is Kahn, why is he working for starfleet. It could be Marcus is holding something over him, like the other augments, to make Kahn to his dirty work.
Not bad. I could believe that. Or, Marcus broke a deal with him about how the augments would be treated (becoming the "crime" Harrison can't forgive).
Still, given what is known about the personalities of these augments, super-confidence and super-ambitions that go along with their superior intellect and strength, how could Starfleet believe they could hold Khan in check? Why would they play with fire like that and not believe they'd eventually be burned?
Dammit! Is it May 18, yet?