Previews of the Dungeon Master's Guide start on October 1st. Today, Wizards of the Coast announced that they would kick off the marketing cycle for the 2024 Dungeon Master's Guide next week with two videos. The first will be a general overview of the Dungeon Master's Guide, while the second will focus on the new Bastion system found in the book. The overview video will run on October 1st, while the Bastion video will run on October 3rd.
The 2024 Dungeon Master's Guide was completely overhauled from the 2014 edition and will feature new adventures, a Greyhawk campaign setting guide (and accompanying maps) and reworked magic items. The Bastion system will also appear in the new DMG and will allow players to create custom strongholds that provide mechanic effects during downtime.
The 2024 Dungeon Master's Guide will be released on November 12th, although the early access window starts on October 29th.