Aside from the anime movie’s very first teaser trailer, the anime’s official website also updated to reveal a brand new key visual for the movie.
Shinobu Shinotsuki, the light novels’ original illustrator, illustrated the new visual. The anime’s director, Yutaka Uemura, is also sitting down for an interview with Newtype Magazine for their February 2018 issue.
Uemura will reveal details about the new movie in that interview.
This includes the fact that the new movie will be set after the events of the TV anime, and will focus on Tanya’s relationship with the top brass.