I just wonder if this park will stand the test of time as Disney has, the Harry Potter Books may be popular now (I do enjoy the books), but what about 50 years into the future. The big challenge for this park will be weather they stick more to the movies (which most people have seen at least one of, and which will be continued to be watched for years to come) or book theme (which because of the movies not as many people have read), and the amount of work and time that must go into the building and design to make the stuff look real. While on one of our Disney trips I have to go to the HP Park and see, I hope they have a gift shop that sells sugar quills.
JK Rowling has input,so I'm sure the park will be faithful to the books/movies.
I'm not worried about the test of time because these books are now considered classics. As for the test of time.Mickey has survived so I don't see why Harry won't.