Some 3 years ago I came with something similar. They way I did it was that each model/unit had 3 possible rolls (2,7,11) when rolling 2 dice, (3, 7,...
Basically you start with a small hand or deck and then there are some card pile that you may draw additional cards or buy them. The idea is to slowly...
I don't remember if it was on the TempleCon live feed or the Q&A following it but they said there will be one for Hordes and expansion for the other...
My prediction is that it will be available on GenCon (since they need a big book to sell there, right?) and will be available for the general public...