CoveTom said:
Many people here seem to assume that because Shatner has a success in Boston Legal that he could not genuinely be disappointed about Star Trek, or that there is no reason to feel sorry for him about not being in the new film. The assumption seems to be that since he is making a good amount of money, and doesn't need the income from another film, that he has no reason to be disappointed. I just don't agree.
Regardless of what is or is not true about Shatner in his earlier years, in his later years I think he has come to appreciate both Star Trek and Kirk. He has finally realized just how good of a character that was and how good a role it was to have. And I think he finally got to the point where he truly enjoyed playing the character, as well as interacting with the fans and being a part of the Star Trek universe.
Now, with the release of this new film, he is starting to realize that Star Trek has passed him by, and that he's considered unnecessary to its success, even concerning a film in which Kirk is integral to the plot. I don't think he's upset, as some have said, because he's not getting a paycheck. I think he's upset because he sees something good on the horizon, something that his good friend Leonard Nimoy is getting to be a part of, and he suddenlly feels left behind.
"What am I feeling? Old. Worn out." - Kirk, TWOK
So, yes, I feel sorry for him, and I also feel sorry for us that we won't get the opportunity to see Shatner -- a Shatner who now truly appreciates Kirk and all Trek has done for him -- reprise the role one last time.