“The 3DS eShop was already a big step forward and we’re trying, with Nano Assault Neo, to bring a real must-have title to the Wii U eShop on day one. We think the best is yet to come on digital.” - Manfred Linzner, Shin'en
Mr. Linzer also talked about Nintendo's support for devs in general.
Nintendo developer support is excellent. We never felt left alone and even years after a platform has been launched Nintendo still updates best practices for developers to get the most out of it.
The process is easy. You get a set of guidelines. If you follow them then your game gets approved. If you don't care about those guidelines then you have a serious problem. The process for eShop is pretty much the same as for WiiWare, only the guidelines changed.
Link
Source:
http://www.gonintendo.com/?mode=viewstory&id=190155