"God" is Gary MitchellCould a big rock really kill a being that was shown creating life? Perhaps Dr. Dehner came to as Mitchell was climbing out of the grave, and she decided the only way to stop him was to transport the planet into the center of the galaxy, past the barrier. The barrier was actually a hole in the galaxy, where Mitchells' powers were greatly diminished. Upon seeing that the Enterprise could penetrate the barrier, he immediately wanted onboard. That's what "God" needs with a starship.
Kirk's pain is a fear of dying alone.Kirk mentions it during the camping trip at the start. He knew he wouldn't die, because he wasn't alone. This fear could've been creeping up on him since David was murdered, when Spock died, or even before that as part of his mid life crisis in Wrath of Khan.
"God" is an imprisoned Q.Well, it's as good an idea as any.
The whole thing was All Just a Dream after all.That's why the whole thing is so totally ridiculous, and explaining the Canon Discontinuity- as well as, possibly, why Kirk (as is alleged) reaches near Mary Sue levels. Kirk just dreamt the whole thing.
Spock and Sybok were actually pretty close before Sybok was banished from Vulcan.Given his acceptance of feelings and his general good nature, it seems reasonable that Sybok would have gotten angry at the Vulcans for tormenting his younger brother. Spock would probably have felt secretly grateful for having one other person besides Amanda who didn't consider him a freak. This would also explain Spock's reluctance to shoot him.
God is a Time LordI mean, why the hell not?
The film is a subtle satire on Starfleet(Borrowed from SFDebris) I mean, look at it. The ships are broken piles of crap that are incapable of even the most basic of functions. All the captains except for Kirk are incompetent fools promoted through loyalty to party doctrine, not through merit. They can't even properly outfit one damn ship with competent people, take whatever schlubs they can bribe with forbidden goods. Doctors practice euthanasia (even with their own families) like it's no big deal. Their public works projects (like Nimbus III, the "Planet of Galactic Peace" are unmitigated disasters. No, my friends, William Shatner did not create a masterpiece to his own ego. He was mocking Gene Roddenberry's naive, socialist vision of the future and socialism in general. It's no coincidence that the berlin Wall fell five months after the premire of this film. It wasn't Reagan who broke Communism. It was Bill Shatner.
The rescue mission was really an orchestrated assassination attempt on KirkIt just really fell off the rails. Starfleet wanted to rid themselves of James Kirk, by then a glory hound, egomaniac, and all around embarrassment, but was at a loss as to how. Since Kirk was viewed as a hero throughout the Federation, the admiralty couldn't just kick him out of Starfleet or simply kill him. Therefore, they had to devise this "rescue mission" on Nimbus III by having a rogue Vulcan named Sybok kidnap the ambassadors, sending the broken Enterprise with a skeleton crew under the guise of "Kirk you are so awesome!" to "rescue" them. This plan was a precursor to the assassination of Chancellor Gorkon aboard the Enterprise in "The Undiscovered Country", meant to create a casus belli for war against the Klingon/Romulan Empires, and to rid themselves of Kirk while allowing them to use Kirk's "death" as propaganda. Starfleet, however, was not aware of Sybok's powers and failed to account as needed, resulting in the disaster of the film.