Download content will happen for the Wii, not sure if it'll happen for Metroid Prime but the channel surely seems like a giveaway.
If you read the link below, Capcom talk about Wii download content
http://news.softpedia.com/news/Capcom-on-Wii-039-s-Future-Concerning-Downloadable-Content-55201.shtml
Those people that think they're perfect give a bad reputation to us who are...
"With the DS, it's fair to say that Nintendo stepped out of the technical race and went for a feature differentiation with the touch screen, but I fear that it won't have a lasting impact beyond that of a gimmick - so the long-lasting appeal of the platform is at peril as a direct result of that." - Phil Harrison, Sony