I am really hoping that it's going to be one of the announcements at their E3 exhibit.
I'm being really superstitious about it and have taken to drinking some mexico-imported glass bottle coca-cola in apprehension of what will happen. Hopefully it's not another Tunnel Snakes Incident.
I...
They've still got quite a lot of material in America, but unless the game series dies out they may eventually move outward. The most likely movement would be towards Canada or Mexico. More likely Canada because it got Annexed By America so they could keep some America flavor in it.
As Gurkog said, the key would be to explore a character who isn't associated with multiple fates (at least, at the time when you set the movie).
That's not the only way to go (See: Fallout: Nuka Break), but it's the way that this one company is going with their Fallout Movie.
You've...