Both of you make excellent points, and I better understand your concerns and in fact share them. I guess I'm not as bothered by a Frozen ride in Norway any more than I am concerned about Donald Duck ride in Mexico. But the Frozen ride is, of course, not the end of it with the meet & greet area and almost all the merchandise seems to have Frozen theming. So I get the "takeover" of Norway by Frozen is over the top and will agree with the money grab comments.
I also agree that the parks used to have overall themes and then the "lands" within them had themes. That seems to be pretty much gone with the examples you cite. I wouldn't be surprised if they re-named DHS again since the "working studio" theme has been pretty much obliterated.
I am concerned about "flavor of the day" attractions that may not stand the test of time. I think Frozen has become a classic and won't be quickly forgotten but am more concerned about Avatar and Guardians of the Galaxy theming. I guess we'll see. Thank you both for the additional thoughts on the topic.