Firefly Studios, creators of Stronghold, and well-renowned Civilization developers Firaxis are teaming up to create a new Civ/Sim hybrid called CivCity. This game will take you down from the familiar Civilization view and let you manage one Roman city as its governor.
It should be noted that some of the people now in Firefly Studios were part of the team that created the very popular Caesar series.
Thanks to Gil for the news tip.