Got info about upcoming expansion from my friend who works as a security guard for Blizzard.
- 4th spec for Mages named spellblade. Uses shield and one handed sword but mainly deals magical damage. Uses charge system like arcane.
- Normal raids will now be 10man only. Heroic keeps scaling from 10 to 30
- Frost dk completely reworked into new frostfire spec. Still dual wielding but gets new flame spells like fiery chain (kinda like elemental lasso, but pulls target to you) and has a option to play with permanent red Dragon Pet.
- Pvp system goes back to mop times. Pvp power and resilience coming back with pvp vendors. No more pvp talents they are now available in all content.
- New profession scrying. This is used to attach benthic style procs and stuff for new spirit gear (head, shoulders, chest) and will replace azerite. No need to grind, but higher ilvl pieces can receive up to 3 scrying enchants
- First raid is under Northrend and has us fighting Nerubians to recover something from Yogg-Saron will also contain first phase for dk only legendary
- Mythic+ will now include timewalking dungeons. These are to grind reputation with infinite dragonflight for mostly cosmetics.
- Last boss is unknown but It's where dk players get their legendary
- Huge revamp for some zones. We will be questing in Alterac and Hinterlands first. They are tied to some death god storyline.
- Affliction, enha, marksmanship and sub rogue are also getting reworked. Soul swap and fel flame returning for affli.
- Heart of Azeroth will be used stabilize world soul in prepatch. We will get a titan keeper combat Pet and title for it.