1. No gratuitous Star Wars-level action sequences that don't drive the plot.
2. No purely "evil" antagonists who lack complexity and moral ambiguity. (Star Trek's usually pretty good on that front, but the protagonists are usually way to purely "good", esp. TNG era, which is why I like DS9 most because there's a lot more conflict over competing virtues and values among the protagonists).
3. No tribbles.
1. No socio-political agenda driven "message." I don't mind a little real-world relevance but do NOT use this film to beat me over the head with something.
I understand your aversion to "preachiness" but to what extent do you draw a line between contemporary relevance and "agenda driven 'message'"? I assume that, in terms of the movies, Star Treks IV and VI come to mind? Esp. the former (save the whales) and then VI, which dealt with nationalism, racism, and the end of the interstellar "Cold War". These are usually considered the second and/or third-best movies next to TWOK. (To be honest, First Contact was episode-ish and frankly, there were Borg episodes of Voyager that had more scope.) Insurrection had a message about forced relocation and exploitation, but the logic of the allegory was somewhat flawed.
Nemesis, while a deeply flawed and poorly executed mess, had a very intriguing premise in the tradition of the naturalist genre of literature (which depicts characters as being shaped and driven by the forces of their environment, beyond their control). It was a nature v. nurture debate, demonstrating the fact that nurture/environment/socialization is ALWAYS the overriding determinate of personality formation and behavior. It was also political, because it touched on the nature of "racial" identification, which is one of the essential underpinnings of human political dynamics. Shinzon was clearly, for all intents and purposes, REMAN---not human ("My Reman brothers"). How he viewed himself, who he identified with, and the way he was raised/acculturated matter far more than his genetics. That hardly "hit people over the head". Many may have been oblivious to it. Frankly, I think it was too subtle, and a better movie should've been built around that premise. But the premise is good Roddenberry Trek.
1) No numbingly superficial moral messages. You want to wrestle with Big Questions, go take a philosophy course at UCLA first.
Is the tackling of a big question concerning the human condition in Star Trek usually superficial, IYO? These big questions are the very essence of Trek. It wouldn't BE Trek otherwise. The very soul of Trek is the conviction that human beings, given the proper, civilized conditions of an enlightened future environment, can and will do the right thing. It is unequivocal altruism. I'm just not sure if you mean macro-sociological moralizing (like preaching about poverty, the evils of Capitalism that Roddenberry clearly disdained) or ANY moralizing in general? Virtually every Trek movie moralized on some level. In TWOK, it was Spock sacrificing for the good of the many; in TSFS, the crew sacrificed for the good of the one.
We all have different reasons for liking Trek. I'm a political animal myself, so when DS9 did the near-future Earth
Past Tense, I was hooked. It was
The Cloud Miners without the facade of an allegorical setting. It was an explicit indictment of unregulated social disparity and trickle-down society (one of the characters even called for the reinstatement of a full-employment act, echoing FDR's call for the right to a job in his Economic Bill of Rights proposal) in which the superfluous population was put in camps (whereas for now, they're stuffed into prisons). But I digress. I'm not saying such a story would necessarily make a good Trek movie, and maybe I'm misunderstanding the type of moralizing to which you'd object, but devoid of any moral message, it wouldn't be Trek and wouldn't be fit to carry the title.