It's difficult to keep anything a secret these days. Dedicated eagle-eyed observers will pick up on anything, not matter how slight, that pops up on the internet. This includes new controllers for a popular console, as is the case with some freshly discovered documents filed by Nintendo with the Federal Communications Commission.

According to the filing, the longtime console manufacturer is currently working on a new controller for the Nintendo Switch.

Is the unannounced Nintendo controller for the rumored Nintendo 64 app?

Nintendo Sends Fcc Details For An Unannounced Switch Controller

claims that Nintendo filed a new product with the FCC and requested confidentiality.