I think the Castle joker ( https://balatrogame.fandom.com/wiki/Castle_(Joker) seen in the trailer) resembles Schloss Neuschwanstein ( https://en.m.wikipedia.org/wiki/File:Adolf_Hitler_-_Schloss_Neuschwanstein.jpg ). Painted by Hitler, the whole discarding cards to gain more power takes a bit of a sinister turn.