This would be a really cool addition. If the map would be too big for 32bit system, maybe make it as a tip of a hat to 64bit players?
I guess a modder could do this as well, but it would be cooler to have it as an official one.
I would love it if there were partial versions of the map as well. So if you wanted to play the whole world map, you could, but that there were options to just play out a local clash between the kingdoms and empires in one area of the map.
Really cool idea, Xia.