Metroid just really seems like a tough sell in both guests' familiarity with the IP and how the heck you actually turn it into a ride. When I think Metroid, I think isolation and exploration, which could be tough to translate. A walkthrough/show experience might work (think Alien Encounter with freakin' Metroids instead of an alien), but I'm blanking on anything else. An in-your-face shooter attraction would be somewhat disingenuous to the IP, for example. Metroid is one of Nintendo's most subtle and thoughtful IPs, so I'd like to see a potential attraction reflect those traits. Was baffled when I saw it on HTF's list, but yeah...we'll see what happens. Metroid is my favorite Nintendo series, so I'd look forward to anything related to it in the parks.