TMDb/Fantastic Beasts: A Natur Celebrity Millennials are wary of the HBO Harry Potter reboot, still burned by the confusing Fantastic Beasts franchise that failed to live up to expectations. May 3, 2026 AceShowbiz - The millennial audience's lukewarm reaction to the upcoming HBO Harry Potter reboot is largely influenced by their prior disappointment with the Fantastic Beasts franchise. While the HBO series may face its own critiques, it cannot rival the confusion and dissatisfaction caused by the prequel films, which never lived up to expectations and were ultimately discontinued.