Some Reddit users have found a post in the Battle.net launcher stating that the Burning Crusade expansion for classic World of Warcraft will be available on June 1st.
The promo material has already been removed from Blizzard, but the screenshots have been preserved
Perhaps this is a common typo on the part of the company. The release date looks too soon, especially considering the usual pre-patch. With this date, the update will be available to players for less than a month, and its release should take place next Tuesday (according to other information, May 18).
The Burning Crusade Classic add-on is now available on the WoW Classic test server in private mode