Most Indiana Jones stories are about objects of great ancient power and Indy's belief that there is a right thing to do with them (Place them in a museum, return them to where they came from, leave them where they are, hide them) and how his idea is in conflict with the antagonist who wants to use this resource for their own selfish gains. Now if the object of great ancient power is a mythological animal (Similar to Everest's Yeti) that idea, that there is a right way to treat the things we find in the world, is not a million miles away from a conservation message, no it's not the exact same thing but it seems to me a reasonable expansion of Animal Kingdom's themes.
As for Encanto, and I only saw the film once so excuse me if I'm misremembering, one of the side characters can talk to animals and has a whole jungle in their bedroom: so in the ride I'd have it so that kid go missing and we follow the main characters into his room to look for him, at first we would have scary encounters with the animals until the end when we find the kid who explains we shouldn't be afraid, the animals are our friends!
Are these 100% in keeping with what some Imagineer said Animal Kingdom is all about in an interview once, I guess not although I'm not sure every single attraction the park has ever made has always met those criteria as well.
For those that honestly believes these are a bridge to far from what Animal Kingdom should be, my question for you is do you agree that Animal Kingdom needs more rides, and if yes but not these then what? Because while the park is no doubt an incredible achievement in theming it doesn't change the fact that every single person I have ever brought to the park since it opened, be they first timers, first in a long timers, or frequent visitors, has after a couple hours turned to me and said " So, uh Now What?"