Does anyone really think Wii Sports wouldn't be over 10mil if it weren't bundled?
Anyway, you can disinclude the game to be fair, but it won't change anything, since there's Wii Sports Resort on the way (no excuses for that one). I'm sure they'll come with a few more hits, at least one or two more huge ones later on - last gen's best seller came out 4 years after the PS2. We're only at the 2 year mark for the Wii. So, even without Wii Sports / Wii Play it'll be all Nintendo.