Okay so I am definitely the wrong demographic for Pokemon, so my opinion is VERY biased.
I fully understand it's a popular IP. Extremely so. A huge money maker. And I could care less about it.
That aside, I think Pokemon does have a hard hill to climb. It's not going to be a natural fit for a themepark experience. It will engage Pokemon fans completely, but how do they get it to appeal to just regular themepark goers? That will be the question. It also risk being similar to SNW. Reliant on buy in, apps, and wanting the audience to engage in a fully interactive experience.
I still land on that One Piece is a far more natural fit for a theme park land or experience, and while it's not as BIG as Pokemon, it's still huge.
But in general, I'd prefer to see a focus on broader lands again, that can incorporate many IPs.
All this to say, Pokemon is likely not going into USF... and USF needs some serious help. I'd certainly prefer Pokemon in USF however... give IoA One Piece. It fits that park just so well.