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 GamePad - Wikipedia
RIP Wii U: Nintendo's glorious, quirky failure | Wii U | The Guardian
Wii U official photos show off Nintendo's crazy new console - CNET
Black Nintendo Wii System Prices Wii | Compare Loose, CIB & New Prices
Mario Sports Mix Nintendo Wii 2011 Video Game DISC ONLY volleyball basketball | eBay
Germany's Next Top Model 2011 - Dolphin Emulator Wiki
New HD Wii Coming in 2011? - The Escapist
Valve Warms Toward Nintendo With Wii U | TechCrunch
Nintendo Wii Family Edition RVL-101 512MB - Black for sale online | eBay
Redesigned Wii To Launch Before Christmas, Loses Gamecube Backwards Compatibility | TechCrunch
Nintendo GameCube software and accessories | Wii | Support | Nintendo
Phineas and Ferb: Across the 2nd Dimension (Nintendo Wii, 2011) CIB - TESTED 712725021566 | eBay
Nintendo Wii U Trailer (E3 2011) - YouTube
Amazon.com: Wii Console with Mario Kart Wii Bundle - Black : Video Games
Lot of 2 Transformers: The Game and Dark of the Moon (Nintendo Wii 2011) TESTED 47875841383 | eBay
List of Wii games with traditional control schemes | Ultimate Pop Culture Wiki | Fandom
Amazon.com: America's Next Top Model - Nintendo Wii : Video Games
Spider-Man: Edge of Time (Nintendo Wii, 2011) Disc Only TESTED 47875841284 | eBay
Chuck E Cheese's Sports Games Nintendo Wii 2011 Disc Only 695771900637 | eBay
The 1,000,000 Pyramid (Nintendo Wii, 2011) for sale online | eBay
Nintendo Wii: The Newly Revamped Wii Console Is The Same Size As Current Wii Console - My Nintendo News
Nintendo Wii 2011 Disassembly - iFixit Repair Guide
Wii Console Varieties - Differences
Wii U - Wikipedia
Wii - Wikipedia
Super Mario Galaxy (Nintendo WII, 2011) Nintendo Selects Complete - Tested 763615970976 | eBay
Nintendo Wii (2006-2013) – History of Console Gaming
