The good news is that there are stores near me participating in this promotion. The bad news is that none of those stores are the ones I usually go to. Some of the stores I've never heard of before and don't turn up exact matches in a Google search so I'm leery of selecting them since the choice is final. (The coupon will bear the name of the store you picked and can only be redeemed there.)
I've tried a couple of different ZIP codes and it turns out there is well-reviewed shop near my work so I may check that out to see if it looks good. Since I have until Jan. 31st to redeem the code / lock in a store / print the coupon, I figure I have time to recon some different stores to see which one I prefer. So at the very least, Marvel's promotion has made me aware of stores I wasn't aware of, so in that respect it's successful.
- Bleeding Cool has some screenshots of what the final coupon looks like.
- Here are some screenshots of the steps to redeem the code: