Command and Colors: Ancients has been so popular that it has already spawned an expansion; hopefully with more to come...

The Greeks & Eastern Kingdoms is the first expansion to Commands & Colors: Ancients. The armies of Philip, Alexander and the Successors meet the hosts of Persians, Scythians and Indians to the east. In this expansion, you will find historical scenarios that focus on the hoplites of classical Greece fighting off the invading Persian army at Marathon and Plataea; epic battles from the Peloponnesian War, the rise of Macedon and Alexander's battles of Gaugamela, Issus and Granicus against the Persians; and battles involving Alexander's successors. With your Greeks you will be able to turn west and battle the Carthaginians in Sicily, or as King Pyrrhus at Heraclea and Ausculum, battle the Romans.

In this first expansion, we showcase over 20 scenarios (the package includes over 300 new unit blocks and stickers you need to fight out these battles). Now, that is a lot of history, but we can do this because Commands & Colors: Ancients is, by design, a unique historical game system that will allow players to effectively portray stylized Ancient battles that play to a conclusion in less than an hour.

I've already pre-ordered it from GMT's website.

They must have 500 pre-orders before the expansion will go into production. Although with the buzz surrounding this one I don't think it'll take long before it gets to 500.