Of course, the title Star Trek is more limiting than some, because it's kind of abstract. You can't do something like Star Trek and the Temple of Doom or The Star Trek Rises. Numbers are unnecessary, but either ST: Subtitle or a title with no ST at all seem to be the only options.
This was really my point, which you've articulated better than I did!

Though, to add to the suggestions, we could borrow from First Contact and call it Some Kind of Star Trek.