For those die-hard variant hunters out there, I just found a 3rd variant on The Black Series 6" 40th Anniversary: Sand People card. I am assuming that Hasbro forgot to Date Stamp early versions of the 40th Anniversary Sand People cards during production, so they slapped on a piece of Black tape with the Date Stamp on the card back.
• 1st version. "Age • Edad • Idade 4+" on card front. Card # 00008077. Date Stamp on Black Piece of Tape
• 2nd version. "Age • Edad • Idade 4+" on card front. Card # 00008077. Date Stamp on card.
• 3rd version. "AGE • EDAD • IDADE 4+" on card front. Card #00014195
I will have to take a look at the other figures in Wave 2 tomorrow and see if any of those have stickers as well. I have added a side-by-side comparison photo of the 00008077 card backs above or you can view a picture on our Facebook Page.