Published
Suicide Squad’s marketing promised Harley Quinn and the Joker as its dark power couple; the released film delivered fragments, and the questions that have followed ever since (her backstory, their relationship, what was cut) turn out to share one answer: the film shot a harder story than it shipped. This page is the lore file, sourced to what the filmmakers have said on the record.
The backstory the film inherited
Harley Quinn is the rare A-list character younger than her fans assume: invented for a single 1992 episode of Batman: The Animated Series as a henchwoman sight gag, she accreted a backstory so strong the comics adopted it — Dr. Harleen Quinzel, the Arkham psychiatrist who sat across from the Joker to study him and was instead recruited by him, one session at a time. The animated origin has no chemicals: she falls sane, by choice, which is its horror. The New 52 comics added the vat baptism — pushed, then diving — shortly before the film, handing Suicide Squad two canons to choose from.
What the film shot, and what it shipped
The 2016 film chose both and then trimmed the result. The flashbacks that survive (therapy, the electroshock table, the vat dive played as wedding, the nightclub where the Joker offers her to another man) sketch an abusive architecture the theatrical edit then declines to prosecute: shot material with the relationship at its ugliest (documented in interviews and the film’s own trailers, including the slap and the car ejection) was cut, and the pair resolved into outlaw romance by the finale. David Ayer has said plainly that the Joker material was heavily reduced; Margot Robbie’s performance, reviewers broadly agreed, carried the full story anyway, devotion played with the mechanism showing. The companion files on this site hold the rest of the film’s lore: the cast and what became of everyone, and the Joker’s tattoos, decoded.
The emancipation the franchise chose
What the 2016 edit fudged, the follow-ups answered. Birds of Prey (2020) opens on the breakup and builds an entire film on Harley learning to be a person rather than a consequence; The Suicide Squad (2021) runs her solo and gives her the era’s most pointed line of self-diagnosis mid-rampage; and the character has not shared a frame with the Joker since. The arc, read whole, is the franchise conducting the argument the fans were already having: the relationship is the origin, not the point. Robbie’s Harley became the DC era’s one unqualified casting triumph (three films, one performance thesis) while her co-star’s Joker got the quieter fate the tattoo page records: erased, recast, and survived by his own forehead.