You don’t have to have read a single Harry Potter book or seen a single Harry Potter film to enjoy it.
Although Fantastic Beasts is another entry in the wizarding world established in Harry Potter, it’s largely removed from the characters fans know best.
Rowling herself helped craft a continuation of the characters in the play, Harry Potter and the Cursed Child, and the author additionally turned to screenwriting to pen the upcoming film, Fantastic Beasts and Where to Find Them.
So, it seems that while Fantastic Beasts and Where to Find Them may be a continuation of sorts of the Harry Potter franchise, it won’t necessarily alienate new viewers.