Notice how GTA 3 took place in Liberty City. GTA Vice City obviously took place in vice city and GTA San andreas in San andreas. GTA 4 was in Liberty City, now there is a possiblilty that another GTA will take place in Vice City and after that another game in San Andreas. All the previous GTA games(from III) had connected stories but GTA 4 was something brand new. So Rockstar might actually do the same thing they did before and make it into a saga type of thing. Just a thought tell me what u think.