I'm glad to see a forum area created for SotMK! I haven't had a chance to play yet but I'm extremely interested in the game and look forward to trying it out in May.
One of the designers was on a podcast recently talking about the game, and they said that they are not officially releasing the rules on how the game works on the harder difficultly levels, they want people to figure that out. He did hint that the word next to the numbers on the card will determine how effective a card is on a certain villain, I imagine he was talking about the description like "Wishful Attack", "Charming Attack", etc.
All I've heard of so far is that I belive you can you two cards at the same time, and if you put two cards together from the same movie or same universe then they will be more powerful. And that using the same card multiple times will make it more powerful.
Has anyone else figured out more than that? What the difference is between Wishful, Charming, etc? How the Attack/Boost/Shield values all work together?