Dear Reader:
Travis Strikes Again: No More Heroes can be played with one Joy-Con, includes "sword action", name explained
The following comes from a Eurogamer interview with Suda51...
"One thing that I decided back at the very beginning, when we first started developing it, as far as gameplay and controls go, is that the entire game would be able to be played with just one Joy-Con.
It's still a bit early so we can't really comment completely on what kind of gameplay will be in the game, but one thing we can say is that like the previous No More Heroes games it certainly will be a sword action-type game, where the player feels good swinging that thing around.
While it certainly is a part of the No More Heroes series, one of the reasons there's no number in the title and that 'No More Heroes' comes afterwards is because it's still the same series, but it's not a direct sequel. It's more the beginning of a new adventure, of a new series for Travis. Since it is the same game world, but just a different series, it will have some elements that carry over and it will also have some new elements as well, as far as gameplay goes."