Well WarioWare isnt the only casual game. Wii Sports out sold Zelda by a lot! But in Japan Wii Sports isnt even bundled with the console and yet it still beat out Zelda. So thats what has Miyamoto very worried and which is also why we are going to see a lot more games like Wii Sports. I myself truly wouldnt mind if they added something that motivates the player to play more. Online or some unlockables is that to much to ask!