Plaguewood Tower

Bosses

Hearthsinger Forresten, Timmy the Cruel, Malor the Zealous, Cannon Master Willey, Archivist Galford, Balnazzar, The Unforgiven, Baroness Anastari, Nerub'enkan, Maleki the Pallid, Magistrate Barthilas, Ramstein the Gorger, and 7 more

In the beta client.

Bosses

Anub'Rekhan, Grand Widow Faerlina, Maexxna, Noth the Plaguebringer, Heigan the Unclean, Loatheb, Instructor Razuvious, Gothik the Harvester, The Four Horsemen, Patchwerk, Grobbulus, Gluth, and 3 more

In the client, not confirmed for launch.