Back in the United States, stricter copyright protections — not to mention greater proximity to major Hollywood studios — have made unauthorized sequels even more rare. But, in classic amoral Hollywood style, the studio had indulged in a similar scheme in 1985 when it released the “Wizard of Oz” sequel “Return to Oz.” (Ironically, 13 years earlier, Filmation had released its own “Wizard of Oz” sequel, “Journey Back to Oz. By the 21st century, unauthorized sequels were mainly the territory of specialists like the previously mentioned The Asylum, which released “Titanic II” in 2010. An unauthorized sequel is just more obvious about its motivations than most.