The film arrived in Japan today with February 11th, 2021 debut, and now some details on the second project have surfaced with that.
The first film in the project was set for an April 10th, 2020 debut as Princess Principal: Crown Handler.
The summer 2017 anime series Princess Principal finished up and in 2018 revealed that it would get a sequel in anime form as a six-part film project.
The production saw some changes from the TV series, notably with Aoi Koga taking on the role of Ange instead of Ayaka Imamura, who retired in 2018 due to health issues.