It’s a very tough question to answer because Bethesda has kind of made their own lore in the east coast with obsidian doing the west coast. If Obsidian got to make another game I could see them going to Baja California or Colorado, both feel right no matter what the “canon” ending is for new vegas. Also Cheif Hanlon has this line that’s been stuck in my head where he talks about the NCR chasing ghosts in Baja.

But with Tim Cain not working at obsidian anymore it seems to me that we’re not going to see another west coast game, at least for the foreseeable future. It feels like Xbox or Bethesda is not interested in a new fallout project, or there’s something weird going on with development bts that were not aware of. For just bethesda I would bet on Chicago or Detroit for fallout 5 in 2032 ish. Till then and problay also when 5 comes out if 4 is anything to go off of, we’ll endure pain, suffering and bad fan mods.