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
Nintendo Wii U Trailer (E3 2011) - YouTube
Nintendo Wii U E3 2011 Hands-On Preview | GameGrin
E3 2011: Nintendo Wii U Preview
The new Nintendo Wii U controller is pictured during the Electronic Entertainment Expo, or E3, in Los Angeles June 7, 2011. REUTERS/Mario Anzuoni (UNITED STATES - Tags: ENTERTAINMENT BUSINESS SOCIETY Stock Photo - Alamy
Wii U, sequels take another swing at E3 - The San Diego Union-Tribune
E3 2011: Nintendo Wii U - All You Need to Know, Video and Photos Included
Wii U | Wii Wiki | Fandom
Wii U - Wikipedia
Nintendo Wii U: The International Business Times Says Nintendo Will Release Wii U In April - My Nintendo News
E3 For Families: Nintendo's Wii U | WIRED
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Nintendo Wii U Launch Still on Track for 2012 | Attack of the Fanboy
File:Wii U controller E3 2011.png - Wikimedia Commons
Wii U | Wikitroid | Fandom
E3 2011: Wii U? Not sure it's for me | Eccentric but Lazy Ramblings of an Intrepid Webonaut
Nintendo Announces Successor To Wii, The Wii U
Nintendo president regrets day-one updates for Wii U - The Washington Post
Nintendo Wii U controller, first hands-on! (video) | Engadget
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E3 2011: The Wii U Controller Needs Analog Sticks and Triggers - IGN
