Suicide Squad: 14 Obscure Easter Eggs You Probably Missed

Harley Quinn's iconic harlequin costume appears a couple of times in the film, first in flash-back when she and Mr J recreate the classic Alex Ross image, and then when she's "tooling up" and rejects it for her New 52 outfit.

But it's actually also in the movie a third time, as part of the Joker's weird lair of trophies (something he's stolen from Batman in another inverted Easter Egg). The costume is on a mannequin next to Mr J's circle of weapons (though it's near impossible to spot it in the film - it was shown off in behind-the-scenes footage), suggesting that he counts her as one of his trophies too.