There is still no name associated with the experience, though it appears to be a brand-new IP. Visually, from screenshots, ...

"Customers will need to download exclusive software to their own Nintendo Switch system in order to participate" ...

As many as 10,000 participants will be allowed to try something new for Switch Online — recruitment opens Thursday morning.

It's some kind of "Playtest Program" for Switch owners, and Nintendo is looking for up to 10,000 gamers to help the company out. "We will perform a test called Nintendo Switch Online: Playtest ...