ou jé:

Dark Brotherhood, the latest DLC game pack for The Elder Scrolls Online: Tamriel Unlimited, will be available on the ESO PTS (Public Test Server) later today and launches on PC/Mac on May 31st, and both Xbox One and PlayStation®4 on June 14th. The Dark Brotherhood DLC game pack—complete with a new Dark Brotherhood passive skill line, an all-new PVE area of Cyrodiil called the Gold Coast, hours of new story content and more—will be accessible at no cost to those who have an active ESO Plus membership. Otherwise, it will cost 2,000 crowns in the ESO Crown Store.
http://www.elderscrollsonline.com/en-gb/news/post/2016/04/25/dark-brotherhood-launch-details