The Shadowlands will feature five major zones - Bastion, Ardenweald, Revendreth, Maldraxxus, and the Maw. In the center will be the city of Oribos, which functions as the main player hub similar to Shattrath City in Outland in The Burning Crusade or Dalaran in Wrath of the Lich King and Legion. There will be four new dungeons for leveling, four more at maximum level, and a new raid. In addition, a new roguelike "endless dungeon" called Torghast, Tower of the Damned, will be introduced for both solo and group play.
World of Warcraft's next big expansion is Shadowlands, set in the realms of the afterlife. The Horde and the Alliance will set aside their faction war to chase a new evil, known only as The Jailor, who has usurped the natural order of life and death. The game is currently in closed Alpha testing, and seems truly awesome thus far (a preview on that is coming soon).