I wouldn't mind seeing their version of England again like in the original GTA. But any europeon city I. General would be neat.
R* already said it was an American game. They aren't leaving the country. The whole point is that it satirizes AMERICA. GTA isn't the same as it was with those first two games so don't say "It started as a British game."
Dan Houser said it himself: "but my own personal feeling is that GTA is America."