Urriak Uruk
Gaming is fun, and fun is for everyone
Yeah the one specific region will be Faerun. Seriously I've heard this one region at a time thing since Tomb of Annihilation and it never happened.
What are you talking about? 5E books have been giving deep dives on lots of regions in FR.
- The Sword Coast Adventurer's Guide (the Sword Coast)
- Out of the Abyss (the Sword Coast's Underdark)
- Tomb of Annihilation (Chult)
- Dragon Heist (Waterdeep Gazetteer)
- Dungeon of the Mad Mage (Undermountain)
- Descent into Avernus (Baldur's Gate Gazetteer)
- Rime of the Frostmaiden (Icewind Dale)
- Candlekeep Mysteries (Candlekeep)
Seems like the D&D team is a lot more keen on exploring Toril by going deep rather than wide, so I see no reason for why they would throw some really expansive book like a guide to all of Faerun. It seems completely contrary to their whole method for exploring Forgotten Realms in 5E.
I know you personally are very keen on a Faerun guide similar to the FRCS, but I'm very doubtful that's ever going to happen for 5E. I'm not sure which region most intrigues the D&D team, although I remember a while ago on a Spoilers & Swag they wanted to release more books exploring different cultures. I think an updated book (with modern sensibilities and a diverse group of consultants) on Al-Qadim would be a great revisit for example.