Crono Maniac said:
All you have to do with Metroid is take the script to Ridley (HA!) Scott's "Alien", give Ripley a powersuit, change her name to Samus, and have her fight the Mother supercomputer before she escapes. Heck, just take the movie and CGI on a power suit. BAM. Instant Metroid movie for less than a thousand dollars!
And you know what would make it even better? Add some sort of interactivity, maybe with a controller of some kind!
In all seriousness, the similarities to the Aliens series aren't coincidental: Metroid is an homage to it. It's the reason for the last-minute decision to make Samus female, and Ridley was named after Ridley Scott.
ETA: Seriously, though, I don't want to see a Metroid movie. There's pretty much no way to do it right that would preserve the things that make the games so great (the solitude, the exploration, etc).