I thought Cast Away with Tom Hanks proved that a movie with little dialogue was indeed possible. A certain relation to the audience is all that is needed for it to work. If the audience understands the situation, they buy into the reality, and you can do whatever you like with it. But, I don't believe it does have to be all silence. While yes, the tense parts most certainly do need to be, I can plausibly see Samus scanning a log book, or getting an info download of some type, and then read it while progressing through the game, or rather have it be read to her. A device like that could further the plot while furthering the exploration and action. Just an idea.
Metroid as a movie though, I'm not sure would work. The series is based on upgrading, then back tracking. If that were to be applied to the movie, it best be in limited amounts. I can see the final boss being right next to where she landed her ship, and that would be sweet (like what happens in all Metroid games pretty much), but if she was constantly going back and forth between worlds that would be lame. A Metroid movie should play like a speed run, with an occasional lull thrown in to solve a puzzle (Anybody seen the Incredibles? When Mr. Incredible comes up from underwater into a cave, he finds a secret password. That type of puzzle solving involves the audience, and wouldn't add to boredom.)