At D&D Celebration 2021, it was announced that the fifth edition core rule books for Dungeons & Dragons would be upgraded to mark the milestone anniversary of the RPG series. These upgrades include updates to the Player’s Handbook and Dungeon Master’s Guide.
According to the "Future of D&D" panel at D&D Celebration, the fifth edition of D&D will see major changes in 2024 when it celebrates its 50th anniversary. Updates will be released in conjunction with the game’s anniversary in 2024. Details about how D&D 5E will change haven’t been shared yet.
Wizards of the Coast has revealed that player surveys will be distributed in 2022 to collect feedback on the changes players want to see to fifth edition D&D rules. There is no risk of the existing and upcoming rulebooks becoming obsolete in 2024 since the new rulebooks will be backward-compatible with those already available.
This will not be the sixth edition of D&D. D&D’s sales in 2020 were its highest-ever, and the franchise is experiencing unprecedented success, so changing course now is not a great business idea. In a similar way to the 3.5E update for 3E, this 5E update will update the rules while still accommodating the older books.