I don't think it's dying. For example, look at GT4P and look GT4 sales. Sure the DLC didn't do as good but who says the series is dying?
but hopefully Rockstar learns their lesson from the negative feedback. Hopefully they can mix in GTA SA with IV (realism wise) and we'll get one hell of a game. As for the DS, GTA on the gameboy didn't even do well so I wasn't expecting it to do well on the DS







