A Real-Time Total War is not a Total War.

However, the system of almost Real time strategy game has been done successfully years before. It's an old space-conquering game Imperium Galactica 2. This game is real-time in terms of strategic map but the time "stops" when a battle occurs. Oh, and most enemies of that game got only one main fleet not a ton of captain-led armies (or fleets, in this case.)

Unfortunately, it will NOT work with Rome or any other Total War games for 5 years or so or probably a decade. One needs a super computer twice as powerful as Time Commander's to run the entire battle map that includes all Europe and the Mediterranean world. That IG2 game has a simple space map with planets as almost dots not elaborate cities like in Rome's battle map.

I normally hate Turn-based but this game is cooler than Warcraft 3 itself!