Harley Quinn Season 4 Reportedly Already In The Works

gamerant.com:

Season 3 of Harley Quinn is currently underway and the fan reaction appears to be just as appreciative as it's been throughout the whole series up to this point. Basically, it's been well worth the long delay. But given how long fans had to wait after the 2nd season even just to see a confirmation that season 3 was coming, it would be understandable if nobody really expected to hear about a potential 4th season anytime soon.

Well, they'd be half right. While it's true that Harley Quinn still has yet to receive an official order for season 4, it looks as though the showrunners themselves may be planning ahead. Seasoned fans of the show will remember how long it took for more episodes to finally air after Harley Quinn season 3 was finally confirmed nearly 2 full years ago. However, it's tough to deny that Harley Quinn has amassed a dedicated fanbase over the years, and the assumption that more will soon be on the way wouldn't necessarily be misguided.

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That's likely why the folks behind the beloved series decided to register an upcoming 4th season of Harley Quinn on the Entertainment Identifier Registry (EIDR), which is a widely-used database that big-time production companies use to make note of their upcoming shows, movies, and similar projects. Not only is the season itself registered, but it also includes the names of all 10 potential episodes. This may hint that the Harley Quinn crew are confident that they'll be renewed after this season, but at the very least, it seems to indicate that there's already a solid plan in place for where the story should go from here.

Anyone checking the episode titles will likely be unsurprised, assuming they're already familiar with