It all depends on the price of the system, as Nintendo doesn't sell at a loss, especially for an accessory. So, say 2$ licensing fee from the patent holder, 3-4$ for raw materials and manufacturing, I'd say that they'd push for around 15$ total.
As for the game, I see no reason not to sell it at 50$. It's a full featured game with more content than wii sports and it includes a cool new gadget. They might try to push 40$ if they really want the game to sell well, but I'd need to talk to Reggie a while to figure that out.
And remember, Wii Sports isn't bundled in japan, and it's selling for full price, and it's still selling like crazy over there. (11.5K last week)
Wii has more 20 million sellers than PS3 has 5 million sellers.
Acolyte of Disruption