No, I can understand wanting to be cautious. After all, Brother Bear and Chicken Little were pretty commercially successful (especially compared to other films post-Tarzan, pre-Tangled) and yet neither one of those has really held up as a "classic". (With the former, I think that's a bit harsh, as it's a solid film- not a great movie, but also far from being one of the worst. With Chicken Little, well, I liked it, but I can totally see why some people hate it, as Disney was trying to make a movie like Shrek instead of making a Disney movie.)
So, yeah, if they put a film in the parks attraction-wise, generally, they want it to be something with staying power.