You can actually read what Orci said here.
What that sounds like to me is that they came up with a basic outline of what they wanted for the story, not that they wrote a complete screenplay and then just changed the names to Khan. It was likely chosen to be Khan very early on.
But it's true that the general concept of the movie could work without Khan. The same general theme would remain without the need for all the superficial elements that come with Khan. And that's really all that they were.
This really needs to be repeated. Orci and Kurtzman started out with an original villain, and then they were asked to fit a previous Trek character in to that villain role, not just because "Star Trek"
Also, given the popularity of TWOK, is it any surprise that they would visit the idea again. I don't think it needed to be Khan, at all, but I don't think it was the worst idea ever either.
I think there was a genuine effort to make a new story, but given the reaction to Trek 09 as "not being Star Trek Enough" I can understand why they would err on the side of caution.
In any case, ID works just fine for me, and others. Come on number 13!
visit WOK yes but not directly copy the most important part of the film to the point of it blurring the line of serious drama and parody like spock screaming Khan.
WOK is a film that should be left alone once and for all. writers and fans need to move on and make another classic star trek film that will rival wrath of khan.
Screaming Khan was pushing it, I will agree to a certain extent. I think that Kirk's death flowed from the character arc very well, and made the scene more impactful for different reasons than the seen from TWOK.
Also, TWOK will keep getting revisited, either thematically or in story beats, because it is hyped up as the best Trek film ever. All other Trek films will forever live in its shadow.