From the release:
Two new units are now available for Dust Tactics! The Panzer-Kampfläufer III and SSU Commissar Squad are available at your local retailer, as well as online through our webstore.
These powerful new units are also available masterfully pre-painted from our Dust Premium-Edition Miniatures line and will be playable in Dust Warfare with the upcoming release of Campaign Book “Zverograd.”