the only villain on staff
The first volume of Shiro Amano's manga adaption of KINGDOM HEARTS III is set to release April 11th 2020 in Japan for 660 Yen (approx. $6 USD). The current chapters of the ongoing series is available to read for free on Square Enix's GANGAN Online in Japanese, and is currently being published digitally in English by Yen Press.
Update 3/27/2020: Amazon has updated with the cover image: