We learned last summer that the Fate/Grand Order project is working through various projects, one of which is the Fate/Grand Order: Zettai Majū Sensen Babylonia anime set for an October 5th, 2019 debut.
The show is set for twenty-one episodes with a two-cour run without a break that begins next month.
One of the details that has been missing is the episode count, which the official site has now updated with.
Chaldea issued the Grand Order for a “Holy Grail Expedition,” to investigate, uncover, and possibly destroy the singularity that apparently will cause the extinction of humanity.