Well, I've been a Khan naysayer, but if Orci and Kurtzman are as serious as they say they are
"I'm already going back and reading some of the books I've missed," he said of "Trek" tales and fan-fiction that have been written in past years, which could be reinterpreted for their new universe. "I'm trying to read every 'Star Trek' book I can get my hands on. We did that a lot for the first movie. ... I'm starting to re-immerse myself again in what's come before."
I'd trust that they'd find an OK way to do Khan. I still hope it's not in the next film.