The Underrot is a dungeon located in a underground cavern at the center of Nazmir. A place where the blood trolls offer sacrifices to their master G’huun — an Old god hybrid experiment gone wrong in the Uldir dungeon (raid). They raise reanimated skeletons and spirits of ancient trolls. There is no map, at this moment.
Waycrest Manor is the residence of Lord and Lady Waycrest. Among the most influential families of Kul Tiras, alongside the Proudmoore, the Stormsong, and the Ashven. Lady Meredith Waycrest succumbed to greed and corruption and sought a pact with the Drust spirits. The price was collected, and the Waycrest have been transformed. The citizens of Drustvar are now either sacrifice to the Drust, or indoctrinated into ways of the Heartsbane Coven.
The Motherlode!! is a Battle for Azeroth dungeon located in the Isle of Kezan, near the Maelstrom. The Venture Co. has been harvesting Azerite, and according to Daniel Stahl during our PAX East 2018 interview, we will come across the Venture Co. in Island Expeditions as well.