Two new dungeons, Chaosball - a new pvp Battlegrounds mode (ESO: Morrowind required), the new Arcane University map, and other times and improvements are on their way to Elder Scrolls Online today. The DLC, Horns of the Reach, was released on Mac and PC two weeks ago, but finally lands on PS4 and Xbox One.
Horns of the Reach is free for all ESO Plus Members, or can be purchased through the in-game Crown Store for 1,500 Crowns. The DLC launches alongside some general improvements available free for all players in Update 15, while Battlegrounds additions are free for owners of ESO: Morrowind. More info can be found on the official site.