The official Twitter page for BanG Dream! has revealed more details for BanG Dream! FILM LIVE. There, they revealed a new trailer, which also reveals a September 2019 release. The staff have unveiled a new key visual for the film as well.
Sanzigen is returning to animate the film, and Bushiroad will distribute it. Expect the staff to reveal more details soon.
However, its not all good news as it seems that the anime’s third season will come later than expected. The staff originally announced it for October 2019, but now, they’re moving it an entire season later. This is because Bang Dream! Season 3 will debut sometime in January 2020.
source: BanG Dream official website