Wasn't mentioned in the other thread about Miyamoto's comments, but there was a blurb in the article that Fortune heard that Nintendo was talking to 3rd parties about NX at E3.
https://fortune.com/2015/06/23/shigeru-miyamoto-wii-u/
https://fortune.com/2015/06/23/shigeru-miyamoto-wii-u/
The problem for Nintendo is the NX’s launch is at least a year away—likely more, as the company reportedly just started talking about it with third party partners at this year’s E3. (The reception, say insiders, was positive.)