If you are going to use elements from the prime reality, at least get the elements right. Khan was a Sikh. He governed a region of territory in either Africa or Asia. Instead, we get a Caucasian. This s**t was tolerable in the past; it's less so now. And, now, if the info is correct, we have another date point for the Eugenics War, these wars occurred in the 1950s. (300 years before 2259.)
Remarkably, I'm not giving a damn about this. Despite Khan being one of my faves from the old show and movies, I won't be judging this movie on how closely it follows them.
It's not as if, for example, the character was ever credibly portrayed as a Sikh anyway.