Mercenaries is the collectable card game I have always wanted. As a hobbyist game developer, I was actually working on something very similar. Not being aware of Mercenaries, I thought it was a pretty original idea. Of course, Blizzard did it a billion times better than my little studio of one could ever dream of. Mercenaries is perfect just like it is. Please don’t mess with it too much.
I think your wish will be granted since they announced they won’t be developing it any longer. 