The cinematic adaptations of DC Comics' superheroes may have taken a darker turn than some would like, but the franchise has yet to fully embrace the comic universe's strangest elements -- which are embodied by "Justice League Dark." There was a time, though, when a live-action version of the supernatural-focused "Justice League" seemed like a reality. Today, we get a glimpse at what that reality might have looked like.

Joseph Kahn, best known for his work as director on the 2004 motorbike action film "Torque," has posted a test video on Vimeo of a fully animated Swamp Thing, sound included. The video was part of a pitch Kahn submitted for the long-rumored "Dark Universe" film, which many thought would be directed by Guillermo del Toro. Del Toro left the project long ago, and an animated version of "Justice League Dark" was recently announced at Comic-Con International in its place.

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The "Justice League Dark" team, initially comprised of John Constantine, Madame Xanadu, Deadman, Shade the Changing Man and Zatanna, frequently found themselves at odds with supernatural forces the standard Justice League could not contend with. Swamp Thing, a humanoid-plant hybrid that fights to protect the environment and his swamp home, played a central part in the series' canon as an ally to their cause.

There's no firm date for the animated "Justice League Dark" film, which is currently slated for a home video release next year.