Still think they might do it.
Whether we like the idea or not, we'll have very little to do with the decision. If the story they come up with is good, and involves Khan - why not? We have to think outside the box here, folks. Everything is fair game now. I'd rather a pre-existing race/baddy than come up with something new that may/may not work (Ru'afo & Shinzon anyone?)
Why can't we have a big budget Space Seed/Doomsday machine mashup?
Gary Mitchell Vs the Cloudminders of Stratos? Tribble Vs Gorn?
Keep it TOS though. Bring in the Borg and you are just being silly.