Bungie plans at least two more significant content updates for Destiny before releasing a full sequel in 2017.
Announced in Activision's earnings statement and clarified in a community blog post, the first update is slated for the Northern Hemisphere Spring, and will feature "a significant Light increase, a bunch of new gear to earn and equip, and new challenges for PvE players."
After that, a "large expansion" is due later in 2016, and a full sequel in 2017.
Bungie has come under fire in the press since the start of 2016 for refusing to lay out a roadmap for the online shooter's future, and will hope this announcement allays concerns.
Its current seasonal event, Crimson Doubles, is underway now.