Leading to the premiere of the new season will be a series of compilation specials of previous arcs, with some new footage, which will air on September 11, 12, 18, 19, and 23, which will be then followed by the unedited broadcast premiere of the Demon Slayer: Kimetsu no Yaiba the Movie: Mugen Train anime film on September 25th. More details about the season, such as the casting will be revealed after the film's broadcast.
As the name of the season suggest, it will adapt the manga's Entertainment District Arc, which takes place after the events of the Mugen Train Arc, and it covers chapters 70-99 of the manga. In the arc, Tanjiro, Inosuke, and Zenitsu accompany the Sound Hashira, Tegen, on a mission to Yoshiwara to help search for his missing wives who were investigating rumors of demons within the district.
[Source: Anime News Network]