The reason nuTrek is doing so well in theaters, is because it's appealing to non-fans aswell, and this actualy creating new fans in the process. However, if you rehash stuff from other series into a new movie, no one's going to get it, most older fans will hate it, and every chance of ever getting any new Trek is basicly gone.
Hmm. I guess by that reasoning using Khan was
a mistake, then?
I'm still not 100% sure on that myself. I feel that the movie could have work just as well if Harrison was just a genetically engineered superhuman, not Khan himself. But atleast Khan was part of TOS. This need to bring something from every show into nuTrek baffles me.
But yes, short answer, it could have been just John Harrison.