https://www.polygon.com/2018/9/19/17874178/nes-controller-nintendo-switch-online-family-plan-8bitdo

Nintendo Switch Online is now live. In addition to putting online play for some Switch games behind a paywall, the service will add cloud saves (finally), a voice chat app and a collection of updated NES games available exclusively to subscribers.

In addition to the exclusive games, Nintendo announced during the most recent Nintendo Direct presentation that it would be releasing NES-style wireless controllers. The NES controllers will only be compatible with the NES games included with Switch Online membership, and will only be available to Switch Online members (which presumably means you’ll have to order them directly from Nintendo).