I really don't see Paramount or Bad Robot spoiling the actual destruction of the Enterprise. Its not like Abrams. The editing of the trailer implies that the ship crashing into San Fransisco bay (and City) is the Enterprise, but we know from careful inspection that it isn't. And I really don't believe they would imply what we can determine to be false, and then crash the Enterprise, as if to say, "Yeah, that wasn't the Enterprise crashing in that shot, but it crashes in another one you haven't seen yet! Two crashing starships!" Looks to me like maybe its a red herring. An effective one, for sure, but I think there is going to be more to it.