Well, I have to admit I'm a Berman-era fan, but until 1991 (I think, I was about eight), I'd only seen TOS.... and though I love Shatner as Kirk, I think that it's over for him. Let someone new come, it'll be all right. I don't need anyone from the old cast in the next movie.
And no, Kirk is not the best character in Trek!
Relax, people, the movie's going to be great, and it doesn't need Shatner in it to do well.