Raiding is also going to be different in Season 4 from sage's blog

To celebrate WoTLK Classic Gold Mythicplus, Blizzard will be featuring two dungeons that were part of the game's last four expansions. The dungeons include one of two wings in Shadowlands' Tazavesh, the two wings of Battle for Azeroth's Operation Mechagon, the two wings of Legion's Return to Karazhan and two to-be-determined dungeons from The Warlords Of Draenor. Players can vote on which two Draenor dungeons should be included.

Raiding is also going to be different in Season 4. There is no new raid to take on, Blizzard is instead looking to ensure that all three of Shadowlands' raid tiers relevant in Season 4. This is by increasing their difficulty, adding a new seasonal affix, and increasing the level of loot drops in each raid.

Blizzard is set to reveal an upcoming expansion for WoW in the coming days on 19 April. This announcement's time of release (most newly announced WoW expansions are generally revealed around BlizzCon in November and announced a year or longer later) will lead many fans to think that the next expansion for WoW isn't expected until in the first part of 2023. The information that Blizzard is now buy WoTLK Classic Gold planning for more Shadowlands season to cover the remaining time in 2022 seems to back that idea up.