First, I was pleasantly surprised by the movie, but after a decade of Disney Disappointments (starting with Pocahontas, and really shoved into the ground with Hunchback, yeah, go ahead and flame me, but in NO WAY were those movies or any since it as good and more importantly universally memorable when compared to the revival films...
But, name one song from it (without googling)...better yet, find yourself subconsciously singing it, even if you've only heard it a few times.
THIS is what a great music can do. A song so catchy you know it by heart after only one or two viewings.
Tangled doesn't have that.
Second, I think that Rapunzel is already fading, as is Merida...note neither are at Cindy's Royal Table or Akershus, which means there is not much consumer demand to meet them compared to princesses who are 30 times their age.
I find it odd, my kid knows who Sleeping Beauty is...but she's NEVER seen the movie. Will Merida or Rapunzel carry on with such fame? Or will they be lost like Mulan and Pocahontas?