Last October, Nintendo and Dark Horse announced their partnership for a graphic novel series based on ARMS that was expected to release in Fall 2018 but it has been delayed to January 2019. [Thanks, @fourhman via Nintendo Everything.]
While Nintendo or Dark Horse have yet to make a formal announcement, the above preview comic that was given out on Free Comic Book Day in a split-book with Legend of Korra has shown a new release window for the ARMS series’ first graphic novel.
ARMS is available on Nintendo Switch.