Most of the movies made a big deal of Kirk wanting to be captain again instead of sitting behind a desk. It's the source of his conflict with Decker, Bones is concerned about him because he can tell Kirk isn't happy in his current position and his demotion is played as a victory. It's pretty clear that Kirk is meant to be captain of the Enterprise and nearly every movie where he wasn't already captain he somehow winds up in the chair. If that is destiny then I don't know what is. It's just not the theme of the movie as it is in the reboot, because it is about him achieving it.