eh, Idk. I personally don't think Pokemon would be too difficult. Maybe some people thought my idea on last page was terrible, but I think as a basic framework, which is all my post was meant to be it would be ok. Add whatever you want to that framework and you got something. I think Mike's idea has potential too. Just as a basic idea, I can see potential in it. I'm personally not into shows, I will usually check them once then never again (few exceptions), but I'm sure they could find a way to make a show like that and get people to engage and interact.
Another idea that I think could work, but hard to express since I can't really explain what I envision in my head... if only I had those talents, is a concept kind of like that discovery center dark ride rumor that we used to hear for Jurassic Park. Have Professor Oak, or some new Professor take us through a lab (through narration), and the ride would basically just deal with explaining the basics of Pokemon. Go in as if guests want to be Pokemon trainers, so the ride would explain what pokemon are, how they are captured, the different starters trainers get etc. Either keep the ride slow and informative whole way through, or idk make it exciting somehow by something happening. Maybe our ride vehicle accidentally smacks into a voltorb that blows up and blasts a huge chunk out of the lab and crazy stuff happens from that point. Either way, I think Pokemon has enough material there to make attractions out of, I have faith in Uni Creative
I personally think Zelda would be the most difficult. I want to see a Zelda in the parks, but I can't figure out what they would do as a land. I can't really think of something to build a ride around. But I may not be looking at it the right way, someone else may have a ton of ideas for the franchise