Obviously, the next step after S is to lay S on its side to make it infinite.
An upcoming “summer” update for Nintendo Switch Sports is coming soon.
The free update will be released on Tuesday night, July 27th (Tuesday night / Wednesday morning) and will include expanded support for leg strap accessories in soccer matches (4v4 and 1v1) and new volleyball moves. After the update, volleyball will include new “slide attack” and “rocket serve” movements.
New tiers for online leagues called S tiers and ∞ tiers have been added. You can also create a match room outside your friends list.