Harley, Batgirl & Ivy by Emanuela Lupacchino.
New details about Suicide Squad’s plot:
[Suicide Squad is] something like a Batman movie from the villains’ point of view. The film isn’t entirely linear and involves plenty of flashbacks, but the present day scenes begin at Belle Reve prison—a penitentiary located in remote Louisiana that officially doesn’t exist. The purpose of the prison is to house individuals that have superpowers, whom the government doesn’t entirely understand. All of the Suicide Squad members have their own, separate cells and have no interaction with each other—until Amanda Waller is in need of an expendable team of assassins, that is.
The Joker, meanwhile, is holed up in an old, decrepit Arkham Asylum,
where Harley Quinn is also being housed. Quinn is considered so
psychologically dangerous that she is held in a Hannibal Lecter-style
cell that’s entirely open, and the guards are continually rotated so
that she can’t get too deep inside one person’s head.
[Source: Collider]


