Re: Hey, um, anybody see Tuvok? *spoilers for Trek XI*
Well the writers have said that the previous generation of characters will still end up being born so I think that Tuvok will be just fine.
Of course, it is entirely possible that the "Vulcan" we see in TNG and so on is in fact the new Vulcan colony. After all the sky is a different colour, and particularly in TSFS and TVH the population seems sparse and the planet very different.
I believe in a better world, so I love Star Trek. I have to live in this one, so I love Battlestar Galactica.