Why does everyone have such a hardon over Metroid having online play? The POINT of Metroid is that is a single person game, you're alone on a planet. Mutiplayer on Prime 2 was a joke and was tacked on to appease people who think a FPS needs multiplayer. It doesn't, there are plenty of other titles out there better suited to multiplayer. Give me online Mario Kart, that would make sense. Give me Wii Sports online with chat so I can play my brother who lives 4 hours away. Online multiplayer support in Prime 3 makes no sense.
The only rumor I have heard about Prime 3 having online that made sense and got me excited was updated missions.