Not much about the gameplay has been revealed so far but these cards do give us a bit of a hint as to how the game will play.
The general flow of gameplay is that each player selects one action to play, and plays an corresponding type of card (Support, Attack, or Move+Activate.) The catch is that you can't play the same action type two turns in a row, and you select your action secretly.
Fantasy Flight has a real broad overview of the game up, as well as a picture of how the cards will lay out on the table.
Every time they release some new details about this game I just get more and more excited. It is scheduled to be out this summer and I can't wait to take a closer look at it.