wow,extremely huge idea,Great thought,WoW!!!!
but its impossible,RTW is a great game,with good engine but not good enough for this idea (due to the engine limits),this idea is like a dream in RTW engine.maybe CA can do a mod like this,many people tried to start a mod like this but they all failed and closed,this idea needs a games company to make it done,but Nothing is impossible.
so lets think about ideas to improve RM and make it Greater.