What I dislike about most science fiction (especially the kind we see on film) is that they reveal a lack of ability to portray or imagine creatures that are hyperexotic. Startrek and its ilk show "people" of far off galaxies, not only speaking English (that's not so bad since they often have mechanical "universal translators"), but I mean they speak middle-class American English and talk about matters that are current in our time and place. They may be purple hominoids with three fingers and bumps on their foreheads but they practically share our culture--not to mention their orientation toward "technology".
I've said this before somewhere else. But the idea that if someone is too different we are left with no alternative but to destroy them is absurd. What a notion! The most extreme adaptation to such a species is total mutual avoidance, unless, of course, there is an inescapable competition for some essential resource in a zero-sum context.
I'd just love to see a science fiction movie in which an alien species is intelligent but SO different that we can't communicate except very minimally. I stress their intelligence to make the effort at communication meaningful/possible, otherwise we'd have to ignore them as we do starfish and manta rays.
By the way, their intellence cannot--if I'm going to enjoy the movie--be influenced by Plato, Descartes, and Newton. And I would be annoyed if their technology was based on a capitalist economy and reflected an Industrial Revolution similar to ours.