The Symphogear Live 2020 → 2022 event announced on Sunday a new project. Their official Twitter also revealed an announcement promo.
The action female idol franchise, written by Akifumi Kaneko and Noriyasu Agematsu, aired its first anime season in 13 episodes in Winter 2012, which was produced by Satelight and Encourage Films. Satelight animated four other sequels in the Summer of 2013, 2015, 2017, and 2019.
Dan Yoshii began writing a manga adaptation from December 2011 to March 2013 in Newtype Ace. Kadokawa shipped the third and final volume in July 2013.
Official site: https://portal.symphogear.com/
Official Twitter: @SYMPHOGEAR
Source: Official Twitter