Long Live the Confederation!
The 'literary' stuff in the movies is all very obvious -- they're the books we all read in High School (and, more importantly, the quotations and references we all know).Could you be a little bit more precise about that last statement? In the past, you pointed out how bad/incorrect the literary quotations in ST movies are. How could they be bad *and* relevant?
Star Trek II builds a nice structure from that limitation. Khan and Kirk each have a book that describes their character, motivations and their narrative - Moby-Dick and A Tale of Two Cities, respectively. The books are diegetic; they show up at the start of the movie: Moby-Dick is the one book you can see on Khan's shelf, AToTC is what Spock gives Kirk for his birthday. Then they both end the movie quoting the last line of dialogue of their book -- hate's sake versus far far better thing.
And that's all... pretty cool, for a Star Trek movie.
Star Trek VI draws from the literature-we-know well, but without the structure or the restraint. The director loves Shakespeare... so everyone quotes Hamlet, outside the bounds of reason! The awkward co-opting for the title is where I can't forgive it -- that idiotic speech about how the undiscovered country is *really* peace in their cold war analogue is like watching geeks explaining that the Tiger's Claw looks different in the movie because it had a secret unmentioned refit (knowing that Meyer wanted it as the subtitle for Star Trek II, which actually dealt with death, makes it even more egregious.)