I wonder if they're doing all these announcements so they have more time to do...whatever they're doing at ML 12th. The star idol does have to sing their new solo after all.

https://idolmaster-official.jp/news/01_17006
(The original image for this is huge by the way)

Yu~neru ML collaboration details from 10/28 - 12/27. Featuring Momoko, Mirai, and Yayoi with chibis of Haruka, Iori, and Akane.
https://u-neru.com/aidorum/