The official site has now dropped a teaser promo for that season that sets a Winter 2020 debut in January.
The series has Minoru Ashina writing and directing the project with character designs by Minoru Takehara, who also serves as the chief animation director.
A mysterious button suddenly appears one day, and characters who press it are taken to a new world to gather.
It’s not a surprise that the main cast and staff remain the same from the first season.