Wall Street Journal : analysts believe NX to be revealed in October
Update: WallStreet Journal reporter Takashi Mochizuki has clarified that if Nintendo doesn't unveil it around the time of The Tokyo game show then Early October will be the next safe bet for an announcement
WallStreet Journal has mentioned that analysts believe that Nintendo will share NX news sometime in Early October. While Nintendo hasn't shared any NX news at all since announcing it in March 2015 many believe that an announcement of sorts is imminent as Nintendo just had a Direct and was present at the Apple Keynote on Wednesday not only that Mr.Miyamoto is in the U.S were people believe he's here to record something for an NX related video.
Whether that's true or not,hopefully Nintendo reveals it sooner rather than later!
