An online play test will be held from February 18 to 20 to evaluate various technical aspects and help improve the quality of the game by testing out random matches for Tennis, Bowling, and Chambara. Nintendo Switch Online subscribers can register to participate beginning February 15.
Here is an overview of the game, via Nintendo.com:
Swing, Kick, Spike, and Bowl Your Way to Victory in a Sports Collection that Will Get the Whole Family Moving
Get moving with Soccer, Volleyball, Bowling, Tennis, Badminton, and Chambara (Swordplay) using Joy-Con controllers! Controls are intuitive, so you can hit the court (or lanes, or field, or arena) and get started. With controlled motions you can curve your bowling ball, add spin to a tennis shot, or even use a Joy-Con with the Leg Strap accessory to kick the ball in a Soccer Shootout. Family and friends can join in on the fun on the same system or online. Plus a seventh sport is planned to be added via a free update this fall; get ready to Golf!
Play Online and Face Opponents Near and Far to earn In-Game Rewards or Aim for the Pro League
Face off against opponents worldwide and strive to reach the Pro League in every sport. As you play online in random matchmaking, redeem points you earn for in-game rewards like outfits, sports accessories, gear, and much more for your avatar. The selection of items will rotate each week, so check back and see what’s in stock!
Play with Friends and Family in the Same Room or Across the World
Bowl, spike, and duel with friends in all six sports! Pass a Joy-Con controller to a friend for some one-versus-one, two-versus-two, or a free-for-all that will get everyone moving. In Bowling, all players can bowl simultaneously—no waiting for your turn. Play each game online, or team up with a friend on the same system to take on opponents near and far in team sports like Volleyball and Tennis.