People seriously don't think Nintendo has anything to offer later this year? Really?? Like all they have is Smash Bros and Mario Kart and then they went and screwed themselves?
They wouldn't have thrown out Smash Bros, Mario Kart, and Wii Fit all in a 3-month period if they didn't have games lined up for the latter half of the year. We already know Fatal Frame IV has a July release in Japan, which translates to a fall or winter release elsewhere. I wouldn't be surprised in the least bit if it launched in October in the US with a big presence on the Nintendo Channel, now that I know the Nintendo Channel will actually be used to promote M-rated games (after seeing the Dementium trailer pop up on it).
On top of which, it was already leaked that Animal Crossing is slated for a winter 2008 release in Japan and likely America as well and Kirby for Wii was also leaked. Kid Icarus is all but confirmed to be in developement at Factor5. Finally, the third party companies that jumped onboard with the Wii a little late (after it launched) will start pushing out their new titles the last few months of this year--perhaps starting as soon as July or September.
On top of which, we have no idea whatsoever what Nintendo is going to suddenly reveal at E3 and Disaster: Day of Crisis is still slated for a 2008 release. If that's not enough, Call of Duty 5 was confirmed for the Wii (so Nintendo will be with the big boys this time) and will be coming out around March 09, and there is still the neutered Rock Band and upcoming two Guitar Hero games coming--and Guitar Hero 4 was revealed to have downloadable content for the Wii this time. The Conduit is also still supposed to come out in 2008.