Megami Magazine recently did a story about the latest addition to the Lyrical Nanoha franchise, which is titled Magical Girl Lyrical Nanoha Reflection. They revealed new details about the project, including the fact that it will be a 2-part anime film.
The first film will be released in summer 2017, as mentioned in the video above, however, there is still no announcement when the second movie will be scheduled, though the producers have told the magazine that the wait won’t be long.
Yukari Tamura, Nana Mizuki, and Kana Ueda are set to reprise their respective roles as Nanoha Takamachi, Fate T. Harlaown, and Hayate Yagami for the 2-part film, with Haruka Tomatsu and Satomi Satou joining the cast to voice the Florian sisters, Amitie and Kirie respectively. The magazine also revealed that the story will take place three months after the events of Magical Girl Lyrical Nanoha the Movie 2nd A’s, during the summer when Nanoha, Fate, and Hayate are in 5th grade, and waaaaaaaay before Nanoha and Fate adopt their daughter Vivio, one of the main characters for the current Lyrical Nanoha spin-off TV anime, Vivid Strike.