The latest official D&D book set in the realms is out now: Acquisitions Incorporated
Based on the podcast/live show/web series
With a new race in the realm Verdan, a mini adventure, new spells and backgrounds and details on the Acquisitions Incorporated corporate structure.
I just got it and currently reading up on it.
TLDR on the Verdan:
That-Which-Endures some kind of "eldritch old god lovecraftian" power of pure entropy swept threw a huge gobliniod settlement in the underdark and merged/mutated all living hobgoblins/bugbears/goblins into one race.