Mine arrived yesterday so I haven't had a chance to try it out yet but here's the new Enemies:
Flame Grenadier(Drone Proxy)
Palace Gd(Theron Gd Proxy)
General Ramm(Boomer Proxy)
The AL Cards ,Locust & Enemy Cards from the Base Game are not used so what you get is unique to the 2 Missions included in the Pack.The new Locust Stats are in general a little stronger that base game standard issue,General Raam is of course a bear so the "Showdown" Mission which includes both the General & the Feral Berserker should be rather deadly
Alas no Mauler is included so my Heroclix figs ones are still without official stats but at least my General Raan converted Heroclix fig now has a real use.
I really wish FFG would come out with some minatures as I don't like the proxy use,if they can do it for AH why not GoW .