The Taken King
From Destiny 1 Wiki
Comet: Plague of Darkness is the 3rd and largest expansion for Destiny, scheduled to be released on September 2015. Unlike previous expansions, Comet: Plague of Darkness will be in a disc form similar to original Destiny. It will not only increase the base level from 20 to 30 but also add 1 extra subclass for each class. Additionally, Comet: Plague of Darkness will add 2 new types of weapons and a new Patrol location on a Hive Ship.
New Missions: 12
New Strikes: 4
New Public Events: 1
New Raids: 1
New PvP Maps: 6