If it didn't happen last year, when they didn't release anything good, I doubt it'll happen now. Too many notable titles like Mario Galaxy 2, Metroid, and Zelda coming out for that too happen.
Pretty funny this didn't happen sooner. Most people I know who have a wii stop using it after a few weeks. Like 3 good games coming out and then 50 wii fit crap games isn't exactly what people want. Look at the difference between the quality of releases on the PS3/360 and the releases on a wii.
I wouldn't be overly surprised. If you're leading the market by a substantial figure for one year, then drop a few percents the next, but still be leading then its not all too bad. Sounds like that will be the case, IMO.
No, Super Mario Galaxy, Metroid: Other M, Zelda Wii all in the same year. Remember when Brawl came out? A whole bunch of people bought Wii just for that. But, yeah, Wii will keep it's ground this year. And it's not like either Sony or Microsoft is going to catch up anyways?