C&C: Ancients expansion #3 (Roman Civil War) just went up for pre-order. This game system is the best light wargame system that I've found and I've been playing it non-stop with my oldest son recently.
Expansion #2 which is also on pre-order addresses the only real negative complaint I've heard about that game which was that the board was flimsy. The new board will be on Memoir 44 style stock. Expansion #3 will also include rules for "grand" battles on multiple maps.
For those who like ancient warfare, this is a phenomenal game system that does a marvelous job of recreating ancient combat. The rules and initial scenarios are available for free on GMT's website.
Here's a link to expansion 3:
http://www.gmtgames.com/cca/mainexp3.html