Talking about the "collection" part of the game and how addictive it is, Mattel has some augmented reality cards up it's sleeves:

http://www.crunchgear.com/2009/10/02/avatar-augmented-realit...

I personally would love to see more than just a simple animation. Think strategic missions, a decision engine etc.

On the other hand, this might also take away a lot of imagination and storytelling aspect of these toys. All you needed for D&D was a good Dungeon Master and a couple of dices. :)