At the time, Inoue didn’t say too much of what type of project it is, the film site does list Toei Animation as involved which, with the popularity of basketball anime this past decade, would make sense to do it as.
Original creator Takehiki Inoue revealed back in January 2021 that the manga is inspiring a new film.
The anime series, based on the manga of the same name, aired between 1993 and 1996 for 101 episodes.