Rockstar has already boasted that GTA V’s Los Santos city is larger than the worlds of Red Dead Redemption, GTA : San Andreas and GTA IV put together, but it seems that they still have bigger ambitions in mind.
"Of course at some point we would like to have one big world containing all our cities," Rockstar producer Leslie Benzies told Digital Trends. "And let the player fly between them and revisit their favorite areas, and in that context re-imagining Vice City would be very interesting."
And it is not impossible for Rockstar to perform that feat. After all they do have all the art assets of those cities, making it easy to move them to a new game a relatively easy task. It is worth noting that a limited version of GTA III’s Liberty City is already accessible in GTA: San Andreas.