Adult Swim announced via their official Facebook page that Attack on Titan: Final Season will be coming to Toonami.
The anime is set to premiere on January 9 at 12:30 AM, right after Dragon Ball Super.
You can check out the original announcement which also embeds a promotional video here: https://fb.watch/2GkAvOZLUz/
Attack on Titan: Final Season is currently airing in Japan and is slated to have 16 episodes. It has not been stated whether or not all 16 episodes will comprise the entirety of the final season of the show.
MyAnimeList.net describes the final season as follows:
With Eren and company now at the shoreline and the threat of Marley looming, what’s next for the Scouts and their quest to unravel the mysteries of the Titans, humanity, and more?