During the QuakeCon At Home opening ceremony, id Software made an appearance to announce some play stats and upcoming plans for Doom Eternal. That included the first word of campaign DLC for the game, called The Ancient Gods.
The studio teased that a full trailer is coming on August 27, but in the meantime, it announced some of what we can expect from the content. The story takes place after the events of Doom Eternal, and focuses on an imbalance of power in heaven.
This was also referred to as “Part 1” of The Ancient Gods, suggesting that it will be a continuous story with another episode coming sometime in the future.