As You and Idol Precure continues to sing, dance and please the crowd, a feature film for the newest magical girl team has been confirmed. Tentatively simply titled You and Idol Precure: The Movie, the solo cinema outing for the Idol Precures was announced today.
A new teaser trailer features moments from the upcoming film, hinting at a cinematic “live show” for the idol-themed trio:
You and Idol Precure: The Movie Teaser Trailer
A teaser visual has also been released, as well as a coloring page:
You and Idol Precure First Teaser Visual

You and Idol Precure Coloring Page

The film is scheduled to be released in Japan on September 12. An official website has also opened for the film. More details will be forthcoming as the premiere date approaches.
Crunchyroll currently streams You and Idol Precure, describing the series thus:
Middle school student Uta Sakura loves to sing any chance she gets. But music becomes more than a hobby when she meets Purirun, a fairy whose hometown has plunged into darkness. The Chokkiri Gang took over her land and began stealing her people’s sparkle. Determined to help, Uta is transformed into the legendary protector Cure Idol and vows to return their sparkle through song.
Source: Official Website