This is kind of my thought as well. By the time this is open to ride, I think a good majority of the Frozen obsession will have subsided. Disney has been shoving it in our faces for so long that I believe people are starting not to care as much at this point. Thats not to say people won't still like it. They just might not be willing to waste a day waiting for the ride and meet and greet, especially if the ride is just sort of Meh.....
eh we are getting a short that will boost popularity and I bet a tv show in the future. I'm sure it will stick around in popularity for a long time .