Well, this is certainly interesting! Respected UK broadcaster the BBC is reporting that the NX platform is expected to be released in June. Where this information stemmed from is unclear at present and may just be a mistake on their part, but a June release for the handheld NX platform would certainly be interesting. We shall have to keep an eye on the article and see if they update the information.
Next month it is launching Miitomo, its first iOS and Android app, and is expected to release its new NX gaming platform in June.
Update: Now it says: Nintendo “is expected to release its new NX gaming platform around the middle of the year.”