I wish I could say first hand, but I can see from a cultural, movie and book standpoint Harry Potter being the "next Star Wars" in that way. I never read the books, and have only seen part of the first movie, and I am vaguely aware that there is a prequel movie. But it is a huge franchise, and doesn't Disney own the rights to it for Disneyland or something?
When it comes to movies only, however, I think there is a great comparison with Peter Jackson's LOTR and Hobbit movies. The first 3 LOTR were awesome and mostly hold up for me. So great, that watching them, then watching the PT Star Wars movies made me look at the PT, and see their flaws. Then, the Hobbit movies came out 10 years later. The first, Unexpected Journey, was actually very enjoyable for me, and full of promise in the same way as Fellowship was for LOTR. Now I know some scenes were added, but the didn't bother me too much. But the other two movies were an utter mess, chiefly due to all the added story line that had nothing to do with the book, and was just made up to stretch a book that is barely 200 pages to 3 movies. Also, like the PT before it, it seemed like these movies were Jackson's playground to experiment with higher resolution and new CGI techniques, and some scenes exist simply because there was new technology to create them, though there was no other good reason. So, like Star Wars, the Hobbit is basically its PT.