I believe I read recently that the Winnie the Pooh lawsuits had been settled.
As for HP not being Disney-related, that may be true, but other attractions aren't either. I don't think the Indiana Jones or Star Wars movie series were Disney. Were they? I don't think so, but am not 100% sure.
Having said that, I guess most of the MK attractions are "Disney", but, at the same time, some came from books that had nothing to do with Disney when written (e.g., Swiss Family Robinson, the Brer Rabbit books).