Finding faults in "Batman: Arkham City" is a fairly difficult task. If you pinned me down in some kind of weird wrestling hold and demanded I register some complaint – why are you doing this? – I'm still not entirely sure I could come up with a definitive answer. "Arkham City" was one of the absolute must-play videogames of 2011, and possibly the best example of comic-book to game adaptation ever.

Maybe my complaint about "Arkham City" is the game ended? Which is like a kid lamenting over a lack of real-life everlasting gobstoppers. Thankfully, a new rumor suggests some actual story extending downloadable content is on the way from Rocksteady.

According to a post at PS3trophies.org, a batch of new trophies show Harley Quinn will feature in an upcoming "Arkham City" add-on. While the game has already received a few character-based DLC packs – Robin, Nightwing – those "challenge room" additions didn't move the story forward. The Harley Quinn trophies suggest a possible side-quest, allowing you to play through a new experience as Joker's fanatical love interest.

Of course, this could all just be some late April Fool's gag perpetrated by some trickster jerk, and we'll all have to go back to dressing up as Harley Quinn in the local park on the weekends. What, you don't do that? In the meantime, here's a list of five other Batman characters I would love to see receive their own DLC.

Commissioner Gordon: Sure, he's no superhero or whacked out villain, but a new side-quest featuring Gotham's second-best detective has amazing potential. Maybe you're tasked with helping Batman solve a recent string of murders, and maybe your mustache is magical (because it is).

The Spoiler: The great thing about Stephanie Brown is how crappy her life has been. At one point, she took over as Robin – after Tim Drake – until Batman decided she sucked and fired her. Then she was Batgirl for a while, until everyone remembered Barbara Gordon is Batgirl. Rocksteady could dream up some revenge story for The Spoiler; a really sad revenge story where Batman says, "who are you, again?"

Bane: The juggernaut showed up briefly during the "Arkham City" campaign, but I want more. Running around Gotham and just beating the crap out of everyone sounds amazing. Well, assuming you can understand anything he's saying under his mask.

Zombie Thomas Wayne: Look, gamers love the undead – or at least the games industry seems to think so, since there is apparently a law requiring zombies in every videogame now. Imagine the look on Batman's face when old man Wayne starts pillaging the city, demanding brain-flavored caviar.

Jackanapes: I'm not sure why I even have to explain this one. Jackanapes is a gorilla in a clown costume who carries around a submachine gun and a machete. If this happened, I would just stop playing videogames forever after, as nothing else could top it.

What do you think about the Harley Quinn DLC rumor? What Batman characters would you like to see receive their own add-on? Let us know in the comments and on Twitter!