I don't think that's accurate.
There are tiers. Some are single-player, some are two-player, some are more. Wii Sports was best with > 1 person, and it didn't hurt it apparently.
* Miis
* NintendoLand
* Major pushed game at launch, similar to the Wii Sports positioning. (Don't see it being as easily understandable or as popular as Wii Sports, but it could sell 2m and still not be as popular as Wii Sports.)
Only in the DX version (just in the U.S.?) that is going to be near impossible to find before Christmas without preorders. Also, Wii Sports was never packed in with Wii in Japan, either.
That's great. Nintendo's going for both groups, especially in Japan with MH3GHD, so it's fine if some of the Wii upgraders want similar games to Wii Sports and some of the non-Wii owners just get it for the core offerings. Probably going to be some interesting overlap between the groups, too, which tends to be a feature of the best-selling consoles historically.