At a promotional junket for Dredd, Karl Urban looks to have let slip to SFX who Benedict Cumberbatch is playing in the forthcoming Star Trek sequel. When asked what it was like having the Sherlock actor on set, Urban said:
(Cinema, Karl Urban, Star Trek 2 (2012))
I've always been fairly wary of the info on his character because he looks nothing like how Khan should be as a genetically engineered superhuman. I've always thought that this character was more up to his speed.
It makes so much more sense. They had said they did not want to be tied into Khan as it was the second film since this is a new universe and timeline. That being said it is classic Trek. Taking a bad guy from the original series and bringhing him to the screen.