Art assets in game files point to it being the site of New Canaan, stronghold of the Mormons who control Utah, and it's going to incorporate the Burned Man (aka Joshua Graham, former Mormon and nigh-unkillable lieutenant of Caesar who was doused in pitch, set on fire and thrown off a cliff for losing the first battle at Hoover Dam). The original Van Buren docs for New Canaan were confusing, as there were two versions - one in which New Canaan was standing, and another in which it had been destroyed (as far as I know, they were for different builds). What I remember is that New Canaan was a fort controlled by devout Mormons and they wouldn't let anybody into the city, but there was a large population of refugees just outside the fort, and a power struggle was going on between the existing prophet, who fed and cared for the refugees, and a young upstart who wanted to kick them all out, and who I believe left the city to rile up a bunch of tribals for war. Meanwhile the fugees are growing more resentful that they won't be let into the city.
Were I to venture a wild guess, I'd say that we'll see something roughly similar with the young prophet replaced by the Burned Man, or something.