The Shat to come back?!
...a studio insider has told TheWrap that a Shatner cameo is planned, there's just no deal yet since the “Star Trek 3” script has yet to be finalized. A meeting with Orci is expected to be put on the books shortly.Source: TheWrap
Badass Digest elaborated on its original report, saying that Shatner would be sharing a scene with the current Kirk, Chris Pine, as well as Zachary Quinto and the original Spock, Leonard Nimoy