I think I have seen it quite a lot of times that the gamecube controller will only work for smash bros, not any othe title. I see your point and would be terrific if they could be used on the wii u for other titles as well. But remember they launched the wii u pro controller, and if they just launch a gamecube controller compatible for the wii u, they would lose money. I know lot of people who still own a gamecube (including me) and if they would allow the gamecube controller to be used on other nintendo wii u games, i would not mind buying a new one just for the reason of buying one.