I would add the parks trying to stay relevant in the short term.
Tower of Terror is over 20 years old, based on an IP from 1959-1965, Splash Moutain is over 25 years old, based on an IP from 1946, Haunted Mansion is an original idea and so is Pirates and Big Thunder...all of which are over 40 years old. Do you see Guardians of the Galaxy, Ratatouille, Pandora, and all these other new attractions having relevancy like this? I personally don't.
These are short-term bottom dollar ideas to boost relevancy in the short term. Which they absolutely have and will. People have eaten up the new additions. For me, however, uprooting older/classic attractions to appease the short-term end up hurting you in the long run.
Toy Story Land, though I don't think the land is well-themed, will hold true because the films are classics. Star Wars Land is a toss up, only because I think it's silly to keep the classic films outside of that land; makes zero sense to me personally. And because of that, it's dedicating a land to IP that's only 3 years old. That is a lot of hope. They are really investing in their new films being on the same level of the classics if they are willing to stake this amount of money and land into it; and again, I think that is just short-sighted. Will we be talking about The Last Jedi 25 years from now? Maybe (I won't lol) but we ARE talking about the classics 40 years later.
Will Avatar be relevant down the road? Will the sequels ever come to? I would say probably not to the former, and yes to the latter, but will they be nearly as popular?
Again, this is all my opinion, but I think they've been very short-sighted recently and it's compounding on a lot of other issues formerly mentioned in other posts