Bitchy Little Boy
... so I can bear with you, please!
Playing is the most serious thing there is.
Certain Heroes, buildings and figurines were offered as Kickstarter stretch goals. If you have already thrown away the wrapper with the "Kickstarter version" sticker on it, check out the stretch goals and see if you have those items. If not, then you may need to contact NSKS, but since it was mailed to you (as opposed to buying it in a store or from some other source), I would think you received the proper version.
The stretch goals are somewhere in the three shrink-wrapped decks. I understand the OP does not want to break them open.