Will it be one of the two out there now or a new one? If they stick with the ones that are done, I'll bet it's the one with Nimoy at the end. However, I hope it's a new one with unseen footage.
As I understand it from a friend of mine who used to work in the NYC office of Paramount, it's likely to only be a 30 second spot, because of the high cost of getting an ad.
I'm hoping that it's 30 seconds of images we have yet to see, and not a re-hash from the existing trailers.