The news comes from the latest issue of the monthly CoroCoro comic in Japan (thanks, Ryokutya2089 / Gematsu), which reportedly teases the game alongside a key visual which stars a boy protagonist and a mysterious monster in a New York-like city. This image hasn't yet been shared online, but we'll make sure to keep an eye out for it and update this article if it appears.
It's not yet clear which studios are behind the title, but it is reportedly set in "a new world that utilises Switch’s performance to its very limit,” where “battles break out between skyscrapers in the middle of a peaceful city."
We don't know about you, but that sounds pretty exciting to us. One last detail known at present is that a manga adaptation of the game is already in the works.
As promised above, we'll update this story when we learn more. Until then, feel free to share your thoughts on what this might be in the comments below.