Wanting Nintendo contained in EU is like wanting Universal's IPs to never leave USF.
"I don't want Jurassic Park at IOA, that's just more Universal and I'm tired of Universal".
Also, unlike Potter which is one IP, Nintendo's IPs have different fan bases. If they decided to announce that Animal Crossing is replacing Simpsons, that's a different crowd than the ones who'd get excited over Zelda at IOA/Epic. Or Kirby. Or Metroid. Or Splatoon. Or Pikmin. Or Star Fox.
Meanwhile if you don't like Harry Potter, well that's three giant lands across the parks you won't really be into, but that's okay, I'm sure Universal puts the same care and effort into things like JP and Seuss like they do HP!
hahaha....