Out of nowhere, Nintendo dropped a video on their YouTube channel, that shows various people from around the world, or at least the northern hemisphere, using a series of devices.
The first device is the large flexible ring, which has a Joy-Con inserted to it, as well as, what appears to be a battery pack. The second is a strap that wraps around the leg, with another Joy-Con inserted into the pocket on the front.
We then get to see a host of people dancing around, stretching, lifting, planking and even a little yoga, so this is clearly an exercised themed device, but Nintendo being them, they are not showing anything off until next week, check out the video and see if you can work it out.
See how much you did, or didn't play things.