If they find a way to sell Poke Balls that allow you to catch Pokemon, and then be able to use them in game, look out. No matter how many iterations there are everyone always wants a Charizard, Blastoice and Venusaur on their team. Ditto for other popular Gen 1s like Gengar, Mew Two, Pickachu.
Also, while I realize it’s a table service place, the Pokemon Cafe does gangbuster business in Japan, if they can translate those dishes to CS, look out.
Then you have the possibility of park exclusive cards.
Pokemon will do just fine.
But so would One Piece, I wanna eat some meat, Soba King soba, etc. Not sure how you translate OP into a ride though, only thing I can think of is a Spider-Man/Transformersesque ride. Hard to translate all that devil fruit/anime action into animatronics.