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
Everything You Love About the Switch, the Wii U Did First - IGN
CV | Nintendo Wii Revolution Prototype Controller
Press The Buttons: Mystery Of The Nintendo Star Controller Solved
:format(jpeg)/cdn.vox-cdn.com/assets/1183076/wiiunetflix.jpg "Netflix interface for Wii U revealed in prototype images - The Verge")
Netflix interface for Wii U revealed in prototype images - The Verge
James Montagna on Twitter: "Here's a more advanced Wii Remote prototype. Overall, they're wider than the final Wii Remote + not as long. The B button is flat, and not hooked like
Nintendo Revolution controller prototype unveiled via auction | GamesRadar+
Cabel on Twitter: "A wild prototype Nintendo Wii. The Wii Remote isn't wireless, but connects via coax!? Neat. It sold for ¥61,000 ($590) https://t.co/3chQPwjh8L" / Twitter
The 'Lost prototype consoles' topic (warning: image-heavy) - Retro Forum - Page 1 | Wii remote, Original nintendo, Wii
One of a Kind Prototype Preproduction Power A Nintendo Wii u GlowFX Stylus Rare | eBay
James Montagna on Twitter: "Here's a more advanced Wii Remote prototype. Overall, they're wider than the final Wii Remote + not as long. The B button is flat, and not hooked like
/cdn.vox-cdn.com/assets/1844861/slide002.jpg "Nintendo details the history and prototypes of the Wii U - The Verge")
Nintendo details the history and prototypes of the Wii U - The Verge
Check Out This Early Wii U GamePad Prototype - IGN
Early Wii-U Prototypes - Wii U Wiki Guide - IGN
/cdn.vox-cdn.com/uploads/chorus_image/image/61938061/DqfGLkyXQAA1qCt.0.jpeg "Original Wiimote prototypes photos show cool, if subtle, changes - Polygon")
Original Wiimote prototypes photos show cool, if subtle, changes - Polygon
Wii Prototype" Goes Unsold On EBay - Nintendo Life
Iwata, Miyamoto, and the Wii Wheel Prototypes | WIRED
Random: Japanese Auction Reveals Wii Remote Prototype For The GameCube - Nintendo Life
James Montagna on Twitter: "Here's a more advanced Wii Remote prototype. Overall, they're wider than the final Wii Remote + not as long. The B button is flat, and not hooked like
IGN Builds a Custom Wii 2 Prototype, Compares Graphic Capabilities - Zelda Dungeon
Random: This Prototype Sega Mega Drive Controller Is Giving Us Serious Wii Nunchuk Vibes - Nintendo Life
Hard4Games - Wii prototype controllers...on GameCube?! We cover them today thanks to MyRetroPop (eBay) and great info from @shanebattye. #Wii #GameDev #Nintendo https://youtu.be/PTXqgPLTjOQ | Facebook
Photos emerge of Wii Remote and nunchuck prototype for GameCube - Nintendo Everything
Figure12. Early Prototype of Attaching a WII remote with Motion Sensor... | Download Scientific Diagram
