Just came across this article on Ign claiming that the new GTA game will be named Grand Theft Auto: Harbour City.
With images showing the design documentation confirming the game.
Got Aprils fools written all over it to me.
Seriously man they could have done something abit more subtle, but everyone knows this is just gonna be a prank.
http://uk.xbox360.ign.com/articles/967/967568p1.html