I have a very strong feeling its going to be London. In game I heard someone talking about going having to go to London or somthing along those lines and in the interview for the guy who plays Luis says he thinks its time for GTA to go international. He also talks about how hard it was having people from London(rockstar) make slang for a daminican character and him giving new imput to improve a true to charcter diolag. London seems easy for Rockstar to do seeing as I think most of them live? Correct me if i'm wrong.