I posted exactly what CNC4 was earlier: it was the cancelled CNC Arena (originally intended as an Asian F2P game) with a plot tacked on so EA could make some money from a failed project. I also heavily disagree with Kane's Wrath. KW was a very solid expansion pack obviously intended to lead into a different C&C 4 than we got.We cannot have another repeat of CNC4.
As for DLC, I most worry about us being nickeled and dimed for units and those "extra" units unbalancing the game since how the heck could you balance them versus a play who lacks them? It'd be Opposing Fronts or Tales of Valour, basically.