Multiplayer Metroid is somewhere between Zelda CDi and getting your eye socket raped. Which, unless you're REALLY weird, is naht gud.
Also to get back on topic we gots a trailer!
Pretty sexy stuff. Not certain if it's in-game, but it looks like it... and the graphics are beautiful, and (I think) cel shaded, so, high five for that because it's one of the few ways to get really good graphics on the Wii.
And gameplay - come on, how does that not look like fun? Assuming we get free-roam this is a day one purchase.