Despite the fact that we have yet to experience the first of two planned DLC expanions of GTA IV American Game Informer speculates that Rockstar are readying a new GTA to be released before the end of the year. That would mean a release less than 18 months after GTA IV - not unheard of (GTA: Vice City released a year after GTA III), but given the lengthy development of GTA IV it comes as a little surprise. But don't get your hopes up just yet, it's just a rumour for now.