The meaning behind the Race Queen is simple. They're calling to people to play and to become quickly the true queen of the game. As if it was a race. Who will be the best(= first place on the podium) Queen of the game?
Race Queen appears in the medieval setting and the speaker is saying "Clash of the Race Queen". That's why your assumption "Race of Queen vs Clash of Queens" that is based only on the first part of the ad, is wrong Zeke. It's not an opposition but the same Queen.
