https://www.polygon.com/2019/2/22/18236455/fallout-76-update-roadmap-raids-quests-prestige-system-camp-legendary-vendor

Fallout 76’s new mode, Survival, arrives in March along with new missions, new items and more features. Bethesda Game Studios shared all the details today in a six-month development roadmap for the game, which will bring high-level raids this summer and an even larger update in the fall.

Developers have three quarterly updates planned — March 12’s Wild Appalachia (whose name and some other details had been announced earlier); the summer’s Nuclear Winter; and then Wastelanders in the fall.