I mean to further expand on my point.
Microsoft's big company game is Halo... and that's about it right? The rest of the big exclusives are third party to my knowledge. (Bungie left but soft still owns Halo.)
Sony has Gran Turismo and God of War... and I think that's all for the "huge" games.
Nitnendo has, Mario Platformer, Mario Kart, Mario Party (or is that third party? like Sonic), Legend of Zelda, Super Smash Brothers, Metroid, and a number of other game games that are at or near the top of their niches... some of which are extremely popular.
There are plenty of sales to go around, but no company is going to come close to Nintendo when it comes to software profitability because they are the best of the best. They have too many elite franchises.
The points brought up by Nintendo are also valid... but I mean, what do you expect they are by far the best software company out there.
There is plenty of money to be made on the Wii and i'm sure plenty of 3rd parties will continue to cash in and gain even more money.
