The Twitter account responsible for the anime IDOLiSH7 Third BEAT! revealed that it will premiere in October of this year.
In addition, a new promotional image and video have been released.
Check it out:

The animation for IDOLiSH7: Third BEAT! is by studio Troyca , directed by Makoto Bessho (Shangri-La), with character designs by Kazumi Fukagawa (GLASSLIP).
Synopsis:
The story is about the young manager Tsumugi Takanashi, who is put in charge of IDOLiSH7 , a newly formed boy band. The group has 7 members and great potential, but they all need to learn how to take their first steps in the entertainment industry and deal with their very different personalities.
