When does SSSS.Gridman return?

SSSS.Gridman is a Japanese anime television series adaptation of the 1993–1994 tokusatsu series Denkou Choujin Gridman. The story focuses on Y?ta Hibiki, an amnesiac first-year high school student living in the fictional Japanese city of Tsutsujidai. It was broadcast for 12 episodes from October to December 2018. A sequel series titled S.S.Dynazenon was broadcast from April to June 2021. A compilation film was released in January, 2021, before the premiere of the anime film.