From what I found on a gaming site:
"A core team of five key Rockstar North staff is hard at work designing the true sequel to Grand Theft Auto 3, we can exclusively reveal. While all attention is focused on the Vice City follow-up confirmed by Take-Two for release in the next 18 months, a small team is working through concepts for a totally reworked GTA game for the next-generation of hardware.
A highly placed inside source operating under conditions of anonymity told us: "GTA 4 is being designed now by a team of five." The source also confirmed that the next GTA game on console - widely believed to be based in San Andreas - will be the last iteration in the present format. "Expect more of the same as Vice City for that, but GTA 4 will be completely different.
"The designers have basically looked at what they want to do and realised they cannot do it with current technology, so they're building it from scratch."
As a result "San Andreas" will mark the last use of the GTA3 engine. Unsurprisingly, it's believed Rockstar North is looking to the next-generation of hardware to realise its vision, with PS3 hotly-tipped by those in the know."
Not bad. I'm a big fan of the GTA series and I had the first one on the PS1 and then every single one up to GTA:VC.













