When I beat the prologue, the settlement screen lagged badly and then didn’t show the screen to get the DK hero card, but the treasure chest next to the Lich King’s prologue avatar was open. After I opened my collection and sifted through the nine professions in wild mode there were no DK hero cards.
So I think the DK hero card that I should have gotten was swallowed by a bug in the system, if the developers notice that they can fix the bug and then compensate for the card that is the priest DK hero card, thank you!