The movie is the result of the combined efforts of Studio Trigger and XFlag
The official website for the movie of Promare has uploaded a new trailer which you can see bellow:
My Anime List describes the story as follows:
“An original anime of Imaishi Hiroyuki and Nakashima Kazuki, famous for Gurren Lagann and Kill la Kill, title that was revealed by Studio Trigger at Anime Expo. This anime was described as a mix of Kill la Kill and Gurren Lagann. We follow Galo, an fresh recruit who embarked in a fire station who used mechas named “Matoi -Tech”.
The movie will premiere in Japan at May 24.
Via: Crunchyroll Latín América (Spanish)