I don't see why they would even entertain bringing Khan back. First of all, Khan is a character found through circumstance due to the turn of events in the "Alpha" timeline. Bringing Khan into the Alternative timeline would need much explaining.
Also, in my opinion, Ricardo Montalbán is the Khan. No-one could succeed the role.
The events of the alternate time-line wouldn't change Khan's situation, he's still be floating asleep in space on the SS Botany Bay.
I wouldn't mind if they used Khan again, except I'd like the story to change, ie not have Kirk and crew be the ones to find him. Maybe have it be the Klingons, as they have a history with the Augments already and the Augment-virus would be affecting the Klingons in Kirk's time, so the Empire searching for Khan could be feasible. I'm sure a different and still decent story could be made with Khan in it, I'm no writer though.
Said it before, Javier Bardem has great Khan potential. Guy can be charming, sauve and threatening.
Well, the Klingons had the Narada in custody for a few years, right? Assuming that, we could see an insanely beefed up KDF in a new movie, if they continue with that storyline. But they might ditch it so it doesn't feel like they're siphoning off the first movie too much.
__________________ In case we find ourselves starting to believe all the Anti-American sentiment and negativity, we should remember England 's Prime Minister Tony Blair's words during an interview. When asked by one of his Parliament members why he believes so much in America , he said:
"A simple way to take measure of a country is to look at how many want in... And how many want out."
Only problem I have with this - despite my love for the Klingons - is that all of the TMP films revolved around the Klingons too heavily. So it would literally be a repeat of TMP with slightly different back-story...
Let's be honest. We all know the second movie is going to be a tribute to the original movies or series. Probably Khan.
__________________ In case we find ourselves starting to believe all the Anti-American sentiment and negativity, we should remember England 's Prime Minister Tony Blair's words during an interview. When asked by one of his Parliament members why he believes so much in America , he said:
"A simple way to take measure of a country is to look at how many want in... And how many want out."
But I know where people are coming from. What has Abrams got that fans of new and old can both enjoy? Well he could follow a path that's been taken but change it to suit the alternative timeline. But he could also do something completely new: new aliens; new threat; new antagonist.
I mean, just watching the first scene of XI when the Narada obliterates the Kelvin: there are already aliens that have never been seen before in ST ever. The same could be done with a new alien fleet hell-bent on galactic liberation - sorry for the bad example .