Next expansion leak. Spoilers ahead.
World of Warcraft: Sanguine
The writing staff does not want to tell Azeroth-focused stories anymore. Vanilla through BFA is seen as the Azeroth arc (with Legion and BFA concluding nearly all classic stories like the Emerald Dream, the Legion, Azshara, the Old Gods, the South Seas, Kul’Tiras, Kezan, etc). Shadowlands onwards is the new First Ones arc.
The next expansion takes place primarily on Nathreza, continuing seeds planted in Legion and Shadowlands. The main enemy is the secret leader of the Dreadlords who through time disruptions manifested his own race into being by manipulating the Mawsworn. He is considered much more powerful than the Jailer. He was imprisoned in the Maw but accidentally unleashed by the player at the end of Shadowlands. His goal is to become as powerful as the First Ones themselves.
The ‘covenants’ of this expansion are more like Order Halls. There are three of them, each based around the three roles; heals, tanks and DPS. You will empower these factions (and yourself) by collecting Ash-Remnants.
A Torghast-style dungeon is in Sanguine and is necessary to upgrade your faction with the Ash-Remnants you earned through other content.
The game is launching with three large zones on Nathreza, 5 dungeons and a mini raid. No new BGs.
There are no plans to go to K’aresh or the Dragon Isles in the near future. Those are primarily built up as a red-herring because the writers think it is more exciting to get unexpected stories than ones people have anticipated for a while. Azeroth is being low key abandoned in favor of other stories.
No new races or classes. No allied races or new customization options. The focus instead is on heritage armor and weapons.
Lootbox/gacha style shit has been talked about since 2015. They’re still playing around with it for this expansion. It could be dropped again but it’s more likely than ever with how bad WoW is flopping.
The team is struggling to figure out how to program working ‘mount races’ and jumping puzzles. No, I am not kidding. They’re acting like this is some rocket science shit.
WoW’s budget is way down since BFA. Don’t expect much in the way of cutscenes or cinematics.
Yes, Sylvanas is one of the primary protagonists of this expansion.
Resources were being diverted to this expansion after 9.1 dropped, but even that has paused because of all the mayhem at Blizzard. I can’t say for certain but I would be really surprised if this launched in 2022, even if it is pretty small.
Also, almost the entire WoW team actually petitioned Blizzard to cancel WotLK Classic since they’re embarrassed by how much attention Classic gets compared to retail. Of course WotLK Classic is coming regardless.