On February 14th, 2023 WoW Classic’s Season of Mastery will come to a close. It has been hinted at in multiple Developer Interviews that there will likely be a future Seasonal Experience for Classic Era Realms, but nothing has been confirmed for a release.
Blue Post from November 2022
As the Season of Mastery WoW Classic experience approaches its end, we will disable the “Enter World” button for all Season of Mastery realms on or after February 14, 2023.