During a Dengeki Game FES 2019 livestream, Compile Heart has announced Mary Skelter 2 for Nintendo Switch. The port will utilize touch screen and HD rumble capabilities. Like the PlayStation 4 version, the game will also include the original Mary Skelter: Nightmares. Other details were not announced at this time.
Mary Skelter 2 released for PlayStation 4 in Japan last summer. There has been no news of an English localization.