The second Doom Eternal DLC, The Ancient Gods Part 2, will be available for download starting March 18 on PC, PlayStation, Xbox and Google Stadia. Much like its predecessor, it will add new gameplay elements such as monsters and weapons. Doom Eternal: The Ancient Gods Part 2 also concludes the Doom Slayer's storyline introduced in Doom 2016.
https://www.notebookcheck.net/Doom-Eternal-The-Ancient-Gods-Part-2-to-be-launched-on-March-18-across-all-major-platforms.528144.0.html