but if there were too seperate systems, what benefits would you gain from the zombie one or would it be like the cod4 prestige system where it's just for showing off.
there definitely needs to be some sort of system for zombies, but considering you earn money to unlock guns they could just give you money, but not rank you up in multiplayer.
people would unlock stuff easier, but you still need to get to certain levels to unlock guns, perks etc.