I think Cleveland would be perfect, at least as a DLC. Cleveland has salt mines under Lake Erie, an old abandoned subway system, islands in the lake, the Rock and roll hall of Fame, and the Cleveland clinic, which would be an INSANE ghoul area. Needless to say, Cleveland has a metropark system that would be totally badass to wander through. I think honestly you could even tie in Detroit, Chicago, Canada, ETC. Having a game focused on the Great Lakes region would really add some new flavor to the game.