Considering we had a a post yesterday telling us the season 2 will end on patch day and season 3 begin two weeks later i’d say 8.2 in two weeks and the new raid / mythic + season with new affixes in a month. Pure speculation tho.
link to the post :
https://eu.forums.blizzard.com/en/wow/t/battle-of-dazar-alor-raid-achievements-and-off-season-details/54352