This is just my idea or speculation, so take this with a grain of salt, but here they are.
Hazbin Hotel (Curious George Tent 1) : Charlie Magne, the princess of Hell, sets about fulfilling her seemingly impossible dream of opening up a hotel called the "Happy Hotel", now called Hazbin Hotel, which aims to rehabilitate sinners. However, the demons of the second Hazbin Hotel, here at Universal Studios, have other ideas, and they're coming for you, wanting to steal your soul!
An American Werewolf in London (Curious George Tent 2) : Cult-favorite An American Werewolf in London is one of the greatest horror films to feature special effects without the aid of CGI, and now, it's coming to life as an all-new, effects-packed maze.There is something evil lurking on the English Moors...an ancient, cursed creature with overpowering strength that prowls the countryside at night, searching for unsuspecting prey. A Four-footed Hound from Hell. Legend has it that those who have been attacked by a werewolf and survive become a werewolf themselves. Now, you must escape the monster's fatal fury or you'll be next! Beware the moon, stay on the road, keep clear of the Moors...and God help you!
Universal Monsters: Dracula's Bloodbath (Parisian Courtyard) : Welcome to Castle Dracula on the night of “The Calling.” Vlad Dracula bids you welcome – be you one of the chosen men and/or women who has been called or merely a mortal man. Those who have been chosen must decide whether to join the Dark Prince in everlasting life as his sire or brides, or reject his offer and suffer for all eternity. The blood must be renewed.
Alien vs. Predator (Waterworld Queue) : In a lab that has turned into an alien burrow you encounter a nightmare sight. A predator who is ferocious and devoured by aliens who are cruel and outrageous. The fierce battle between the strongest monsters will eventually transform into a “hunting” aiming at your life thoroughly! ! Experience the despair of the real thing in the grotesque world that has been recreated with amazing quality and scale.
The Exorcist (Soundstage 29) : The film that fueled your worst nightmares has returned to Halloween Horror Nights. Enter the most haunting scenes from the film as 12-year-old Regan is possessed by a demon, possibly the devil himself. It’s a battle of the wills between good and evil.
Clowns 3D: Music by Slash (Mummy Queue) : Legendary guitarist and horror aficionado, Slash, has teamed up with Halloween Horror Nights to bring a frightening new sound to this original 3D maze. Welcome to Clowns 3D: Music by Slash, where you will experience a mind-blowing, sensory overload of your darkest fears. A dilapidated roadside attraction that was once a thriving ice cream factory awaits you. Once you step through the funhouse doors, you quickly realize this establishment is run by psychotic clowns who have murderous designs on their unsuspecting patrons. This place is really a hellish torture chamber and the key ingredient in their twisted desserts...is you!
Helluva Boss: The Awakening (Front Gate)
Dark Angels (New York Street)
Terror of London (French Street)
Zombie Invasion (Metro Lot Tunnel)
Holidayz in Hell (Metro Lot)
Jurassic World: Extinction (Lower Lot)