Quick question, Have Halloween become a dangerous time of the year in this setting?. Just curious.
Kinda. Halloween is still the "modern version" of the holyday - worldwide that is -, but certain parts of the world use different version of the holyday.
Also, all of the Halloween-related monsters and legends are a thing here, making the 7 continents a much darker place. Cover your neck, wear garlic, and do sun. If you want to stay alive.
So, there are multiple "Headless Horseman"'s ,Horsemens of Death, Non-Greek Gorgons, Vampires, Mummies, Eldritch horrors, the entirety of Edgar Allan Poe mythos, all of DOOM, Dr.Jekyll and Mr.Hyde, multiple Draculas, Werewolves, Snow Queens, evil Fae and so on.
And no, Maleficent isn't a MAJOR treath right now, she is stuck in the English Channel, scowling because she can't go anywhere. Essentially, she is an angrily-depressed middle-aged fae, who is in contact with Eris and (begrudgingly) the 3 Good Fairies. They met up sometimes to watch Major Players fail.