Haven't submitted anything for awhile so I whipped up some more GTA fan art after seeing the Fan Art topic over at GTAForums (for the next GTA).
Only thing that sort of contradicts my idea of the next release in the series is it will not be titled literally GTA V. The V is used to represent sequence, in that this will be the title following IV. I believe the IV's successors will follow the same idea as the "III series" did, in that, there were several stories (games) per numeric. Take a guess at where I assumed the next title to be set.
Download for full 2680x1600 image (could use this as a wallpaper if you wanted-- only submitted under Fan Art > Wallpaper > Games because it seemed to be the best match).
PS, the October 19, 2010 release date is totally made up, the only thing partially legitimate about it is that it falls on a Tuesday and within a "realistic" time period for the next game to be released.