From the announcement:
Dream Pod 9 has been showing off sneak peeks of several tanks for their Southern Faction over the past week, and today they begin taking pre-orders for those tanks. They have four brand new sculpts available, the Hetairoi, Ballista, Hittite, and the Recon Hun all for the South. Head over to their online store and be sure to get your name on the pre-order list. All orders begin to ship June 14, 2013.