by robot_romeo
1. The main cards are the standard size 63x89. The character cards are close to 75x101.2. The only available expansion is a stand alone expansion "Heroes Unite". The first real expansion "Crisis" is slated for third quarter, and another stand alone, "Villains United" is coming fourth quarter. There is also a "Batman vs Joker" mini game coming out some time in between them.
3. And yes all the art from the cards, including the "weakness" cards are different in the sets. The "weakness" cards in "Heroes United" are of Superboy getting hit with a Kryptonite beam.