I never said they used the word folklore, but for all intents and purposes that is what it is referring to. Why didn't it open with "imagined" animals from films, then? Could they not add Star Wars aliens and Xenomorphs?
Expedition Everest is the proof of this in my opinion; the mythical creature tied into the culture of the geographic area that the section of the park is themed to. It's a perfect fit.
Avatar is just this: Walk down a path and suddenly you're on another planet with animals and nature that James Cameron 'imagined,' and conservation is important back on earth because James Cameron's movie that these animals came from has that message. And now ride on a flying 'imagined' animal and look around at the imagined natural wonders that James Cameron imagined. And now ride on a boat through the imagined natural habitats of these imagined animals that are depicted on screens and projected on cutouts and there's one physical representation of the imagined animal and it's singing a song in an imaginary language, but see how beautiful it all is? Don't forget about the random robot body-suits that used to have a meet-and-greet—nothing hammers home the message of Animal Kingdom like a mechanical man!
Seriously, I'm so tired of people twisting themselves into knots to make Avatar fit. Just because it's well done doesn't mean it was a good idea to go in the park.
Same thing is happening with Zootopia, so my apologies for going off track here a bit. Zootopia doesn't fit, but neither does Avatar. And if Avatar does fit, I see no argument against Zootopia.