True, but that's the only thing they know about the future. There may be other set-in-stone things Spock "Prime" could tell them about, but I doubt that he would. And it wouldn't matter if they stopped the supernova in the "alternate" timeline - the timelines would stay the same. They just might prevent a possible *third* timeline from developing, assuming the Nero/Spock scenario played out the same way again (which I doubt it would).

And Skyjedi - the current Blu-Ray releases have the theatrical "Motion Picture," "Wrath of Khan" and "Undiscovered Country," but the Director's Cuts of those three will be released on Blu-Ray in the future. (which means TMP's new effects will have to be re-done in HD. Why the fuck didn't they do it properly to begin with? Ugh.)

I haven't bought it yet (I'll wait for a price drop), but I really like that the TOS Blu-Ray contains both the remastered AND original episodes.