What is the 'On The 50' Collectible?

There has been a lot of speculation about the 'On the 50' collectible, but we can now be sure that it's about the Super Bowl Promo.

With the new Super Bowl cards being revealed, we noticed a little curiosity. The 'on the 50' logo appears on the new Super Bowl cards! We're not sure yet about what specifically the card is for, but it is likely a part of a set for the new Super Bowl cards.