From the preview:
The soon-to-be-released Edison Single Miniature Expansion for Tannhäuser opens up a host of new tactics and strategies for Union and UMTOMA players. Edison not only has an impressive list of special equipment, but also a few special rules that make him a unique force on the battlefield. The first, and perhaps the most powerful, of these is that he grants your squad the power to exchange one of your usual Heroes for two Troopers, allowing you to field four Troopers total. Combining these extra Troopers with Edison's Command pack can, in a three Command Point (CP) game, make Edison seem nearly invincible.