I think Nintendo realizes it needs to make a huge splash the first year to really lock in a strong user base.
Everyone believes that Nintendo possibly can't or wouldn't release its 3 big guns this year.
But, those three big games (Super Mario Galaxy, Brawl, and Metroid Prime 3) are the games I most expect to make it this year. The other games I would be skeptical of.
What people seem to forget that each one of these games is being developed by completely different development teams and that they are all most likely being polished up and completed as we speak. We also know that Nintendo has been trying to shorten development times for their games. Many of the games on this list have been in development before the Wii even launched, possibly several months before it launched.
Finally, Nintendo already announced they have 45 Wii games in development right now. This release schedule is literally just a fraction of that number. Therefore Nintendo will have know games to save for 2008...and these games aren't small fry games but will be big name games for Nintendo...games like: Kirby, Animal Crossing, F-Zero, Mario Kart, Pikmin, and Zelda.