The Phantom of the Opera is all but confirmed, however the overall rumor is The Universal Monsters set in Paris, which already includes The Hunchback of Notre Dame and The Phantom, which takes place in the
Paris Opéra House/Palais Garnier. The only remaining monster that I'm unsure of is either Dracula or The Invisible Man, but I'm more so expecting the latter especially since we already had Dracula last year. I love the look of The Invisible Man, but I wouldn't complain if they had Dracula though