I hope you don't mind a critique, but the worm's eye view perspective used here makes it look like it was taken through a fish-eye lens, distorting the picture. The action taking place here is unclear and the scene looks a bit cluttered. A distance or overhead view might work better and enhance the impact. (:: like I should talk::
Gorgeous. Reminds me vaguely of the Wrath Gate situation from WoW or the attack on the wall in Lord of the Rings. The attackers do kind of look more like Alliance soldiers than the orcs from LoTR.