The official website for the movie Free! The Final Stroke has posted the first full official trailer for it.
It's worth remembering that the trailer was delayed by a week due to the hiatus of the band OLDCODEX , and the September 15th release of the film's theme song was also put on hold.
Free! The Final Stroke will premiere in Japan on September 17th , and the second part of the film on April 22nd, 2022. The trailer shows that the films are indeed the final chapter of the franchise.
Source: ANN