The next official Dungeons & Dragons campaign is called Baldur's Gate: Descent into Avernus and it will involve a journey back to the famous city of Fearun. The players will eventually need to descend into the underworld in order to take on an extradimensional threat to the city. It has now been revealed that Descent into Avernus will act as a prequel to the upcoming Baldur's Gate III.
Baldur's Gate III is being developed by Larian Studios of Divinity: Original Sin. A representative from Larian Studios and a representative of Wizards of the Coast were present during the PC Gaming Show at E3 2019, where they spent their time on stage giving as little information as possible. One of the few tidbits of information given during the Baldur's Gate III segment of the show was that Baldur's Gate: Descent into Avernus was a prequel to the upcoming video game.
It's unclear exactly how Baldur's Gate: Descent into Avernus will tie into the events of the video game. Descent into Avernus involves a conflict with an archdevil named Zariel and the hordes of devils under her command, while the enemies in Baldur's Gate III appear to be mind flayers.
It's possible that the connection between Descent into Avernus and Baldur's Gate III is little more than a throwaway line in order to justify a cross-promotion between the two.
There is an alternate cover for Baldur's Gate: Descent into Avernus that shows the symbol of Bhaal, which is the name of the god of murder. Bhaal was the main focus of the original Baldur's Gate games, which had a running storyline that was referred to as the Bhaalspawn Saga. It's possible that Bhaal is somehow responsible for the events of Descent into Avernus and Baldur's Gate III, which could tie the tabletop adventure and the new video game to the earlier entries in the series.
The fans won't have long to wait until the secrets of Baldur's Gate: Descent into Avernus are revealed, as the book will be released on September 17, 2019, while Baldur's Gate III is coming to Google Stadia and PC in 2020.