Speaking to Kotaku earlier today at the Electronic Entertainment Expo, Nintendo of America president Reggie Fils-Aime revealed that the Wii U will not support GameCube games. One of the selling points of the Wii was that you could continue to play your library of GameCube titles on the system - and you could even do it with a GameCube controller.
Sadly you'll have to dust off that old cube or have that old Wii around to play your favorite GameCube games. Nintendo didn't say why it was ditching backwards compatibility with the new system, but this should be the first hint that the hardware is probably going to change dramatically.
We will have more on changes to the system as it comes to light.