Hopefully this is a big or oversight that you can fix and not a feature. There are cards in the current Marvel, Super Heroes boosters that are worthless to me. I recently goto 'Black Panther, Wakandan King' and I was excited to add it to a standard deck I frequently play, but I could not.

The card only shows up when I change the deck settings to HISTORIC. The card in the current expansion pack is already obsolete?? Is there some kind of subset in the expansion that doesn't count. For the same expansion?

I think this also happened with a Captain America card a while back, but I didn't catch the full name or try to find it then.