Here is what the developer had to say:
Against a darkening background of famine, disease and war, a new power is rising in the great steppes of the East. With a million horsemen at his back, the ultimate warrior king approaches, and his sights are set on Rome…
The next instalment in the multi award-winning PC series that combines turn-based strategy with real-time tactics, Total War™: ATTILA casts players back to 395 AD. A time of apocalyptic turmoil at the very dawn of the Dark Ages.
How far will you go to survive? Will you sweep oppression from the world and carve out a barbarian or Eastern kingdom of your own? Or will you brace against the coming storm as the last remnants of the Roman Empire, in the ultimate survival-strategy challenge?
Take a look at the official announcement video below:
Total War: Attila is slated for a 2015 release for PC.