Yes, it’s the Curse of Osiris.
The expansion has been leaked on the Microsoft Store more than a month ago but today at Paris Games Week we got to see the first trailer. Now we know more:
Destiny 2 Expansion I: Curse of Osiris continues your Guardian’s journey with all-new story missions and adventures set in a new destination, Mercury. Journey through time and space to learn the secrets of Osiris, avert a dark future, and rebuild the ties between the legendary Warlock and his greatest student – Ikora Rey.
The expansion for Destiny 2 is set to come on December 5 for all platforms simultaneously.