Rome: Total War expansion

Gamestop is already listing an unnamed expansion for my favorite game of last year, Rome: Total War. What will the expansion be?

Well, if Total War forum dwellers can be trusted (and the poster is referring to a recent issue of PC Zone magazine), it will be titled Barbarian Invasion and will focus on the late Roman Empire as it heads towards collapse. Huns, Vandals, Sassanids, a divided empire and all that.

The official announcement will likely be made at next month's E3.