I've suspected this for a while but after watching the Nimoy version of the trailer I'm now more sure than ever that I'm right. Old Spock is going to die to save the Enterprise. If you watch the part of the trailer where he says "Live long and prosper" there is a slight pause between the "long" and the "the" which makes him seem a bit emotoinal that he's seen Kirk again, most likely for the last time. Am I the only one who got this feeling?