For those of you who had September 7 in the pool, some bad news.
http://www.nintendoworldreport.com/news/47972/launch-window-narrows-for-nintendo-switch-online
Nintendo Switch Online will be arriving later in September.
In a press statement sent to Nintendo World Report among other outlets earlier tonight, the service was revealed to be launching in the second half of September (16th - 30th).
Additional details, such as an exact date for the service's launch and the other 10 Nintendo Entertainment System games to be included with the subscription, are to be revealed sometime in the next few weeks.