OH YEAH! And there's THREE heroes you can get by buying them! There's a low chance of getting a card with a hero code in a booster.
Armored Spidey is one of them, and the other 2, well, I have no idea :D not enough info from ye olde players.
I don't know how much they cost, but it's also possible that there's other codes that unlock things like items and missions.
Stay tune for more info, and remember to pick a few boosters up. And remember if you get two codes for the same hero somehow, make sure to be generous and give it away - its the best option.