It looks like an employee of Amazon has let the cat out of the bag in relation too as till unannounced physical release.
A listing for a physical copy of NBA Playgrounds on Switch has appeared on Amazon Canada for $59.99 Canadian dollars. It has the release date slated for March 13th, and can even be pre-ordered right now. At this point, Saber Interactive (the developers) have not announced a physical release for the game.
NBA Playgrounds launched last year on all platforms to mixed reactions. The Switch version was especially controversial since Saber had to rush to get it onto the system in time, and thus ended up delivering a slightly sub-par experience compared to the other versions. Improvements and changes have been made and new features have been added to the game as a whole since launch, but almost all of those updates were totally MIA on Switch until just recently with the launch of the new ‘NBA Playgrounds: Enhanced Edition‘ which totally replaced the original game.
If this listing is accurate, then it looks like the devs are hoping to give the game a second wind. It’s already currently high on the ‘Best Sellers’ charts on the US Nintendo Switch eShop.