TIL The prototype wiiu gamepad has circle pads : r/wiiu

Nintendo Wii U Prototype Gamepad - Consolevariations

I've compared the prototype E3 gamepad against the retail version. Nintendo did make some changes after the E3 in 2011 when they exhibited the console. : r/wiiu

Wii U (Platform) - Giant Bomb

GameCube controller - Wikipedia

Wii u gamepad touch pad problem : r/wiiu

Wii U GamePad - Wikipedia

Wii U Controller Redesign by TheCongressman1 on DeviantArt

Nintendo Wii U preview: specs, games, and everything in-between (video) - The Verge

Nintendo Wii U experience it all.