There are rumors going around that Khan will be in the sequel to Star Trek, and the front runner for Khan is Nestor Carbonell. Nestor Carbonell does have a striking resemblance to original Khan, Ricardo Montalban. He might also have the acting chops to give credence to the role. Carbonell is probably best known for playing Richard in Lost(Also JJ Abrams). He also played Batmanuel in The Tick, and the Mayor in The Dark Knight.
Again this is just a rumor, and up to this point we are not even sure if Khan will be feature in the next sequel.
Love the new Star Trek, and hope they bring on a great follow-up.
-access out. Godspeed!