I was just thinking about the last generation of videogame consoles and the GTA games that were made during it. The first game of that generation was GTAIII, a sequel to the last generation's(playstation) grand theft auto 2(GTA2 was also on the dreamcast, but it was just a port). After GTAIII came GTA Vice City, then GTA San Andreas. While these games came after GTAIII they weren't really sequels in the series, but just the same game with the same controls and engine with new settings, characters, and some added on stuff(motorcycles, ability to swim).
Now I was wondering, since GTAIV is coming out for this generation, which is the first GTA entry of the generation, and is an actual sequel(IV), do you think in a year or two do you think there will be another grand theft auto game using the same engine as the GTAIV but in a different setting like GTA:VC/GTA:SA?