The film is directed by Kobun Shizuno (Fist of the North Star: The Legend of Kenshiro, various Detective Conan films) and Hiroyuki Seshita (Ajin, Knights of Sidonia) with Nitroplus's Gen Urobuchi (Kamen Rider Gaim, Fate/Zero) credited for the film's concept and screenplay.
Animted by POLYGON PICTURES, the film will be released this year. In addition, the film will have a stage event at AnimeJapan 2017, which will happen on March 26th. The film's main voice actors will appear in said event.
[Source: Anime News Network]