A new leak seems to indicate that Destiny 2 Guardians will be headed for the moon. The name of the expansion is "Shadowkeep" and it will send players to "a forgotten moon" to explore a "mysterious enemy citadel to become a slayer of nightmares". The leak was discovered by dataminers after today's Season of Opulence update was deployed, though Bungie will not officially be revealing more about Shadowkeep until a special live stream to be held on Thursday afternoon.
In the meantime, the Season of Opulence has officially launched that brings some new tweaks to weapons along with a few pieces of armor. In addition, players will find the new Crown of Sorrow raid, the 6-player activity called The Menagerie, several new quests and the Solstice of Heroes in-game event.
You can check the full update notes by visiting the Destiny 2 site.