Someplace like Black Marsh could be an interesting setting.
There are plenty of reasons to believe a great open world game can have a good story as well.
Fallout 4 isn't even out, and we're already looking ahead.
Bethesda wants to build to three or four big releases a year, but is currently churning out about two.
There have been hints of the setting, but never anything concrete.
Focus is still on Fallout 4.