Rumor by WiiU Daily: http://wiiudaily.com/2012/06/nintendo-offering-insane-incentives-to-publish-on-wii-u-eshop/
The source, working at a European developer who previously informed on Wii U Achievements (a report which was later confirmed by Nintendo), said that Nintendo is taking digital downloads seriously this time. He said Nintendo wants to offer all retail games first and third party titles available as downloadable titles on the console via the Wii U eShop.
Theyre offering insane incentives for publishers to sell retail games as downloads on the console. Youd be stupid not to take advantage of it and go retail box-only, he said, adding The new platform is perfect for indie devs, its a whole different ball game than WiiWare. Theyve learned a lot from that mess.
Its just a much bigger revenue cut that youd get selling it on any other platform at the moment, plus promotions on the online store. If they [Nintendo] pull it off and it gains traction, itll press the other guys [Microsoft and Sony] to give more of the revenue to the publishers. Its very good for us who make games.