A second season of Made in Abyss: The Golden City of the Scorching Sun is in development. Technically speaking, this is the third overall season for the Made in Abyss anime. Kadokawa uploaded a short trailer for Made in Abyss season 3 on its YouTube channel. [Thanks, ryokutya2089!]
The Golden City of the Scorching Sun aired from July to September 2022, and directly followed from the events of the first season. The majority of the episodes followed Riko and her friends’ time at Illblu, which is in the sixth layer of the Abyss. Since Season 2 adapted the Illblu Arc, Season 3 of Made in Abyss will likely animate the Capital of the Unreturned and Curse Fleet Arcs.
However, it is unclear just how it will stretch the remaining chapters into a whole season. The conclusion of the Illblu Arc was in Chapter 60, and the latest update for the manga is Chapter 63. Time will tell if the anime plans on moving ahead with an original story. In the meantime, you can watch the announcement trailer for Made in Abyss Season 3 here:
It pretty much consists of scenes from the first two seasons. The trailer does not provide any details on a release window or new cast members. More information for it will appear in the future.
Made in Abyss Season 3 is in development.
Related: Best Watch Order for Made in Abyss on Attack of the Fanboy