There are so many movies based on video games Halo 4,Mortal Kombat, and Super Mario Bros to name a few so why has there not been a Metroid movie yet? Rumor has it that a Metroid movie was in the works in 2007 but was cancelled because Nintendo wasn't really up for it who knows.
Most Metroid fans like myself have been dying to see a live action Metroid movie for a very long time now. Most movies based on video games aren't all that great cough Super Mario Bros cough cough. I truly believe Metroid could change that but that's only if Nintendo is interested