I figure it would be an objective map, with Rome giving victory to the player.
Basically its a map of the Roman Empire with 8 starting points representing the different barbarian tribes. Since there we're 8 tribes that sacked Rome it could be made on a what if basis. I'm thinking Vandals, Huns, Visigoths, Ostrogoths, Scots or Angles and Saxons, Parthians (Sassinids), Dacians, Franks.
The map designed to allow the various barbarian tribes to have space to grow and move into the Roman empire before coming into contact with each other, so to prevent to easy an option of killing the other guy instead of sacking Rome.
As much as I want to do this map, I don't have the time. If someone wants to run with it I'm cool with that. Maybe I'll pick it up at a later time.