If they were the same original characters, then that would mean that the events of the altered timeline have in fact erased and overwritten all that we know of the events of the prime universe. I prefer to believe that the Abramsverse is a completely separate alternate universe in and of itself and not connected to the Prime at all other than possibly OldSpock - if he is ineed from the prime, that is. For STXI to be an alternate reality/universe, these must, by definition, be different people. The original characters we know are still in their/our universe totally unaware of the existence of the other versions of themselves in the Abramsverse while the NuTrek versions are in the Abramsverse doing their thing unaware of their counterparts trotting along in the Prime Universe. They are separate people if you believe the alternate reality plot. That is a fact - at least according to the writers.
If these are different people then for me the movie loses its emotional impact. Spock Prime knows the Vulcan he was raised on still exists so being forced to watch its destruction really isn't as bad as it would be if it was his planet Vulcan he was seeing destroyed. Nero seems to think that it is Spock's planet that he is destroying and not some other Vulcan from some other universe.
Despite the fact that the authors want this to be a paralell universe story I have a difficult time reconciling it with what is seen on the screen. I will accept the paralell universe theory because I did like the movie but it is very hard for me to reconcile that theory with what I see on the screen.
Exactly! I agree with you. It is difficult to understand why OldSpock was so "emotionally compromised" by the destruction of an alternate reality version of Vulcan when he supposedly knew his own Vulcan was still alive and well in the other universe. It is because of the alternate reality/universe premise that I don't care about these characters. The fact that they are alternate reality versions of the TOS characters and not the actual TOS characters I know completely negates the possibility of me giving a crap about them or anything that happens to them. Now, if this movie took place in the original TOS universe, and TOS-Spock's Vulcan was actually destroyed, then his emotional response could be justified and I would have felt sympathy for him. I simply can't feel any emotion for these characters because I know they are not the ones that I have been a fan of for most of my life.
Edit: This has absolutely nothing to do with the re-casting of the TOS characters. The fact that different actors are playing the characters is of no consequence. Even if it were an origin story dealing with the original characters, younger actors would have to have been used. I have no problem with that.
Just for anyone interested, this is a link to a thread I posted on startrekmovie.com back in April of 2009.
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It addresses the "Linear Vs. Dimensional" time travel issue with a theory of my own.