What I like to see Nintendo do is advertise the hell out of Donkey Konga. As far as I know, no other console has a bongo drum accessory, so it's unique. Instead of trying to steal the thunder from GTA:SA and Halo 2 with Paper Mario 2 and Metroid Prime 2, which will a difficult, and near impossible battle, they should make the Gamecube the PARTY BOX!
Have commercials where 2 guys and 2 girls are playing such games as Double Dash, Donkey Konga, and Metroid 2 multiplayer. Show them having tons of fun. Besides, at Christmas, what people want is to share the fun times, so Nintendo should put the cube in that position to make it happen.
Then when RE hits in January, advertise the hell out of it, movie trailers, prime time (not late night) commercials, magazine ads, maybe even bus ads, or bill boards. This title has the chance of really shifting the public perception of the Gamecube, which brings us to 2005...
RETURN OF THE KING!