I'm still a little behind in my comic reading, but I am curious about a few of these new titles...mainly New Mutants and X-Force...and maybe Excalibur. The front of the cards show the main artwork for issue #1 of each title, while the backs have the characters listed for each team. There is also strange symbols which turn out to be a type of hidden language. The last card in the pack was a decipher card. I haven't taken the time to translate all of the cards, but I like this idea.
This is a cool little promotional piece by Marvel. Of course being a trading card and comic fan I love it when these two hobbies collide. I wouldn't mind of Marvel did more of this, especially with some of the upcoming big story arcs like Annihilation or Marvel revisiting 2099.