Splatoon "Paintball" (That's Actually Laser Tag)
Splatoon-themed paintball, but with huge amounts of paint splashing all over the place would be huge fun, but perhaps a little impractical at a family-friendly theme park. It's one thing getting wet on a log flume, but mom probably won't appreciate being covered in brightly colored paint. A team-based laser tag style game in a fully interactive environment seems far more likely. Grab a splatling from the armory and "paint" the environment with light on interactive surfaces that behave just like they do in the game.