Wii Sports Resort, New Super Mario Bros Wii, and Wii Fit Plus are obviously much stronger titles going into next year than Wii Music and Animal Crossing. With each of those games having good legs, the first part of the year should be good (especially with the price cut).
I think the second half of the year is tough to call. I think Wii Relax is what they expect to be a hit in the same fashion as Wii Fit.