Without William Shatner and Leonard Nimoy's unforgettable performances as James T. Kirk and Mr. Spock, it is highly unlikely that there would have ever been a TNG, DS9, VOY, ENT, or Star Trek XI.
It all starts with them. The lack of respect that these two sometimes get escapes me.
Nimoy gets less flak because he generally keeps his mouth shut. Shatner, less so, because his is mouth is always moving.
Some new kid will play Kirk in this next movie, and I'm sure he'll do a fine job. I seriously doubt, however, that he will do as much to solidify that character in pop-culture history as William Shatner did. If Pine succeeds, it is because he stands on the shoulders of giants.
Few ingredients in the Star Trek recipe are as polarizing as William Shatner.
The reasons to love him and/or hate him seem nearly infinite.
Regardless, his contributions cannot be denied.
Whichever Star Trek is your favorite, you owe William Shatner for that, on some level. If that's too hard for you to accept, then you should probably ask yourself why.
Either way, it's the truth.
Shatner may not be in Star Trek XI, but there would be no Star Trek XI without him.