Update 2/27: Ubisoft has announced details for The Division 2’s first year of free post-launch content and some info on what’s coming with the Year 1 Pass.
The free post-launch content includes new episodes, additional narratives and missions, new PvP and PvE modes and new specializations that each include a new signature weapon and skill tree to unlock.
Tidal Basin, which is coming shortly after launch, will “reveal a new challenging stronghold held by the Black Tusks.” Operation Dark Hours is also coming soon after launch, and will be an 8-player raid: a franchise first for The Division.
Episode 1: D.C. Outskirts – Expeditions is coming summer 2019 and will be based in the surrounding areas of Washington in two additional main missions and a new game mode that investigates the fate of a lost convoy.
Source: IGN.com The Division 2 Post-Launch Content Revealed