In a new interview with Access Hollywood, Benedict Cumberbatch has referred to his Star Trek character by name for the first time and it matches the official info:
I play a character called John and not that other name. It’s interesting. Speculation is speculation and that’s all fun.
What other name? He’d been accused of being Khan, under an alias.
I play John Harrison who’s a terrorist and an extraordinary character in his own right. He’s somebody who is not your two-dimensional cookie cutter villain. He’s got an extraordinary purpose, and I hope that at one point or other in the film you might even sympathize with the reasons he’s doing what he’s doing — not necessarily the means and the destruction he causes. But it was a great ride, not just because he’s the bad guy and the antagonist but also because he has a purpose and it’s hard not to see his point of view at certain points.
One man’s terrorist is another man’s freedom fighter, as they say.
There is much more to this than meets the eye, don’t you think?