HALLOWEEN (2018)/Harley Quinn TV Series (2019-Present) Prompt 1:

(Gotham City Boogeyman)

Instead of being transported to another Maximum-Security Prison within Illinois, Michael Myers is successfully transported to Arkham Asylum, in Gotham City, following 40+ Years being institutionalized in Smith's Grove Sanitarium. Despite arriving at a more Maximum-Security Asylum, that specialized in superhuman criminals, many that could easily surpass him, Michael doesn't feel any sense of fear… Still doesn't talk… Still doesn't cry… Still doesn't even move… He remains still, almost like Catatonic, and his face remains blank of any emotion…

During his time in Arkham, Michael is subjected to torturous experiments, in attempts to make him stronger, and even get him to get a reaction… they succeed… but not what they had in mind… every time an inmate or security guard mocks or threatens Michael, he remains silent, but deals out brutal reactions, almost killing them… although most of the inmates of Arkham keep their distance from Michael, now knowing what he's capable of, 2 female inmates: Harleen Quinzel (Harley Quinn) & Pamela Isley (Poison Ivy), begin to take notice of him… as well as him being aware of them… Overtime, despite not interacting much with them, Michael begins to see Harley and Ivy as somewhat 'Friends', deciding not to kill them…

One day, a Riot breaks out in Arkham, caused by Ivy, determined to help Harley forget and move on from her 'Boyfriend' The Joker. As Ivy knocks Harley out with some of Plant Pheromones, some Security try to recapture them, but Michael attacks and kills them, defending them… only for Ivy to use more of her pheromones to knock him out as well…

Sometime later, Michael awakens, only to find himself no longer in Arkham, but in Ivy's apartment, In Gotham City, along with Harley. Michael sits up, before looking at Ivy healing and re-growing her plants with her powers, but before he can react, he then notices a pair of Charcoal Grey Coveralls, A Navy-Blue Work T-Shirt, some underclothes, Black Safety Work Boots… and a weathered, but Blank, Pale, Emotionless Shape mask with Brown hair… The Very same one he wore in 1978…

From her living plant: Frank, Ivy tells Michael to change into his original attire, and then wake Harley up…