Jools Watsham of Renegade Kid had this to say:
Guess who’s an authorized Wii U developer now? Yep, Renegade Kid is in the Wii U house baby! 
The creators of the Nintendo 3DS eShop title Mutant Mudds are now an official Wii U developer. Let’s see what they can cook up on this.
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Source:
http://thegamingpixelshow.com/renegade-kid-official-wii-developer/