one more thing, Nintendo stated back in the Winter that they were shifting their focus from the DS to the Wii. I think there are a buttload of Nintendo games in dev for the Wii, and many of them are for the Core. (Zelda, Mario, etc)
However, I believe it is high time for a new 3d DK Adventure.
End of 2009 Predictions (Set, January 1st 2009)
Wii- 72 million 3rd Year Peak, better slate of releases
360- 37 million Should trend down slightly after 3rd year peak
PS3- 29 million Sales should pick up next year, 3rd year peak and price cut