We have new information on the extent of the new GameCube controller adaptor's compatibility. Contrary to the report below, it will allow GameCube controllers to function exclusively with Super Smash Bros. on Wii U.
This is disappointing. I bet there would be people who think this adapter would work for all games instead of just Smash especially when people buy used adapters from eBay where sellers don't always list all the details and specs of stuff they sell on eBay.
I wonder if another company or a hacker just make an adapter to make the Gamecube controller work for all Wii U game.
I bet with 3D printers being so popular these days, people can just print their own Gamecube controller's case, and button which work for the Wii U by using the internal parts from a Wii U pro controller installed in a 3D printed Gamecube controller's outer casing.