Other large modding projects are already in the works for bringing Fallout 4 to Seattle and Miami, just off the top of my head. Honestly, it is neat to see a modding team looking outside the US. Here's the trailer for Fallout: London in all its very un-American glory. There's no release date yet, and it's certainly looking like there will be plenty of infighting between its new, British factions. Things look just as irradiated, divided, and gritty as you'd expect from a major Fallout 4 mod project. Fallout: London is planning to take players to see how the war affected things in the UK.
Yet another giant Fallout 4 modding project has released a trailer for an ambitious expansion-sized campaign.