Batman: Arkham City - 10 Coolest Easter Eggs, Secrets And References Explained

3. Harley Quinn's Pregnancy Tests

Warner Bros. Interactive Entertainment

Arkham City dangled a lot of potential plot-threads for the sequel, but only one was followed up on in a major way - Scarecrow's return. Hush - who had the potential to be a major villain in the third game - was relegated to minor side role in Arkham Knight, and it seems as though Rocksteady nipped another potential plot thread in the bud before it could become a major thing in their next game.

Approach Joker's Steel Mill office in Arkham City, and you'll actually spot a crib in the middle of a room. There's a Scarface puppet repainted to look like a little Mister J, and some positive pregnancy tests next to them - the implication being, of course, that Harley Quinn was pregnant.

Now, the idea of Joker having a child isn't anything new. In fact, both Arkham City and Arkham Knight pay homage to one of the stories where they "adopt" a new child - Batman Beyond: Return of the Joker. Harley sings Hush, Little Baby in Arkham City's credits, just as she does in WB's animated classic, and Arkham Knight's Jason Todd arc takes the idea of Joker torturing a Robin to breaking point from the same film.

In the end, though, Rocksteady opted not to move ahead with Harley's pregnancy, revealing in Harley Quinn's Revenge that further tests read negative. Arkham Knight did find a different way to continue Joker's legacy though, having him manifest in Batman's inner mind, as well as in the creation of three new proto-Jokers in Johnny Charisma, Henry Adams, Christina Bell and Albert King.

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WhatCulture's very own resident movie guy, Ewan has been working in the content creation biz for over 10 years now, having started as a freelance contributor to WhatCulture Gaming all the way back in 2015. After graduating with a First-Class Honours in History from Northumbria University in 2017 (where he won a prize for a totally killer dissertation on the Watergate years), Ewan took on the role of Comics Editor at WhatCulture and quickly developed WhatCulture Comics into one of the biggest superhero-focused channels on YouTube. He followed this with a brief hiatus at Screen Rant in 2021, where he worked across the Gaming and Film sections as a writer and editor, before returning to WhatCulture as a Senior Content Producer / Presenter in 2023. He started his own podcast, We Love Dad Movies, in 2022, and has contributed several written pieces to the Eisner-nominated comics website Shelfdust as well. In his current role, Ewan incorporates his love of cinema, comic books, and history into written pieces and video essays for WhatCulture's Film & TV channel, as well as WhatCulture Gaming and WhatCulture Horror, with a particular focus on nineties-era Dad Movies, old school Westerns, and Golden Age Hollywood Noir. John Carpenter is his fave, and he thinks Batman Beyond should never have been cancelled. If that's your vibe, you'll probably like his stuff.