Set in 1926 America, we know that it will involve a a fanatical organisation called the Second Salemers who seek to expose witches and wizards in the USA.
Well, we hear of one scene that was filmed inside and around St George's Hall in Liverpool, doubling as New York. While there have been reports and photos that show the hall decked out in American flags, I've been told that the final product was closer to that of a fascist rally. And that there were exterior shouts of protesters with placards supporting and opposing the John Voight character.
It may be that as well as going for a Salem-style feel, they may also be an allegory for the rise of fascism in the conflict between wizards and muggles – sorry, no-majs….