Shawn Fonteno the voice of Franklin in the GTA single player story confirmed that they are doing additional voice acting for single player DLC. For anyone that hasn’t played the DLC for GTA IV these are very meaty expansions. The potential content could also impact GTA Online, bringing all new things like weapons, vehicles or game modes. It’s good to see a re-release get this much commitment instead of being a cash grab.
Also, if you haven’t had a chance to play the GTA V story mode, I still strongly recommend it if you have time this winter. It’s one of the most fun campaigns you’ll play in a long time.