Hello. I've got the details on the next expansion.
New Expansion: Tides of Madness
Level cap increased to 120.
New Continent / Area: South Seas
New Zones: Kul'Tiras, Tel'Abim, Plunder Isle, Tortallia, Zandalar, Nazjatar
Zandalar and Nazjatar are level 120 zones similar to Suramar.
Kul'Tiras will partially open before the expansion releases.
Post-Cap Leveling: Hero Points and Hero Talents
EXP earned passed level cap earns hero points to spend on hero talents.
Very similar to current artifact progression.
Layout is the same as pre-MoP talent trees.
Designed to not be impactful as artifact talents, but plans to carry over into future expansions.
New Hunter Spec: Void Ranger
New ranged hunter spec that mixes bow attacks and shadow spells.
Uses focus and mana.
Unlocked by completing a hunter-exclusive quest chain at 110 in the South Seas.
Other class changes: new Level 120 talent.
Some older spells may be brought back.
New Feature: Player Navy Fleets
Player-customized boat used to travel between different zones.
You command the capital ship, the rest of the fleet gets sent off to other missions (similar to Order Hall Champions).
Tied into another new feature: Uncharted Isles
Randomly generated isles you can explore.
Find treasure, fight powerful beasts, many other surprises in store!
It is an expanded version of Argus invasions (they were planned to be randomly generated but the team didn't have time.)
Some itemization changes.
Warforged / Titanforged now fixed 5 / 10 ilvls respectively.
Sockets are now fixed instead of randomly being added.
New Item Slot: "Amplifier" (name TBD), provides large bonus to one secondary stat at the cost of another (ex. +200 Haste but -200 Mastery)
Item squish is coming, along with an item level squish.
Legendary system will not be returning.
Artifacts will be unsable; some artifact powers will be made baseline, some talents, others removed.
7 New Dungeons
2 Raids; Zuldazar and Palace of Azshara
Myhtic Plus returning.