At the New York Comic Con Justice League Dark panel, director Jay Oliva talked about how the new animated supernatural superhero movie was inspired by Harry Potter, the Final Fantasy video games, and the Full Metal Alchemist anime.

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Oliva wants to feature Specter in the next Justice League Dark movie if this first one does well and they get to make another. He also said he’d include Lucifer Morningstar at a fan’s request.

Matt Ryan is down to play more Constantine in whatever form that may take, whether it be on Arrow, Legends of Tomorrow, or another animated feature.

Executive producer James Tucker said that Wonder Woman on their radar in some form or fashion.

“I’m a huge Final Fantasy fan. I was inspired by a lot of the magic I watched in a lot of my old video games,” Oliva said. “[I was also inspired by] things like Full Metal Alchemist. I take all of the things that I love and throw them into the DCU and come up with something new.”Oliva explained that when magic is used in the movie, it takes on a different look depending on who is casting the spell. The demons have fiery runes, Constantine’s magic is green, and Zatanna’s is white or blue. He borrowed the transformation symbols from Full Metal Alchemist. He said this movie is essentially what his version of Harry Potter would look like.The audience was treated to four never-before-seen clips. If you want to avoid all manner of spoilers for Justice League Dark, then best avoid the rest of this article.The first clip established the enciting incident where the Justice League sit around a table discussing strange reports of normal people becoming possessed and committing crimes. Wonder Woman is the first to think there’s a magical reason behind what’s happening, naturally, but Batman is skeptical, even after all the weird stuff he’s been up against.It’s also worth noting that Green Lantern John Stewart and Hawkman were sitting at the Justice League meeting table. We’ve yet to see them since the DC film universe rebooted at the end of Justice League: The Flashpoint Paradox, but the filmmakers said they like introducing fan-favorite characters into the movies in an organic way as the years go by.The rest of the clip takes place in Wayne Manor. Bruce Wayne is shaving after a shower and he’s surprised when the name “Constantine” appears written on his fogged up mirror. He shakes it off and walks into his bedroom where the name “Constantine” is now written all over his walls in red blood.Speaking of Constantine, actor Matt Ryan played the character in the short-lived NBC TV show, as a guest star on Arrow, and now he’s voicing the character for this new animated feature. Ryan spoke about how difficult it was to get the spells right, and that during his time on the show an exorcist and dialogue coaches were hired to help him pronounce everything correctly, which came in handy while recording his lines for Justice League Dark.The second clip sees Constantine in a bar fight with some demons. Jason Blood watches but refuses to help… until Constantine uses a spell to force Blood’s darker half out, the Demon Etrigan. The two then combat the demons, who have a few surprisingly humorous lines when they see they’re up against Etrigan himself, and are then banished back to hell in pieces.Blood becomes himself again and tries to chastise Constantine for making him become a monster again, but Constantine has already summoned the magical transporting House of Mystery (an element used in the Justice League Dark comic book) and skedaddled.Character designer Phil Bourassa talked about how it was a freeing experience to work on DC’s supernatural characters for a change.“It was a tremendous amount of fun, getting to introduce Etrigan, Deadman and Constantine. The main Justice League members are so well established in the comics already. The justice League characters are perfect and godlike, you have to stay close to the established characters. But [the Justice League Dark members] are freaks and monsters and I have more room to play. In this case, the monsters are the heroes,” Bourassa said.The third clip sees Batman, Constantine, Zatanna and Deadman walking down a street, but when they reach the apartment of their friend, it’s being guarded by three dark ghosts called Shrouds. The Shrouds are said to linger around death. They become drawn to Batman because he has escaped death so many times. When one Shroud floats up to Batman’s face, Batman says, “Boo!” and scares the ghost away. And then Constantine banishes the Shrouds with a bright glowing spell so they can continue on to their destination.Batman voice actor Jason O’Mara recalled recording a scene (not shown at the panel) where Deadman tries to possess Batman, so he was forced to do Deadman actor Nick Turturro’s Brooklyn accent inside his own head. Of course, Batman’s head isn’t a place you’d want to be. ‘It’s crazy in here! I got to get out!”The fourth and final clip takes place in a swamp. Batman, Constantine, Blood and Zatanna are there in search of Swamp Thing. Constantine talks about how Alec Holland is the Avatar of the Green, but Batman is still skeptical of magic and doesn’t buy it, saying Holland was killed by terrorists and had his body thrown in a swamp. Constantine casts a floating spell and hovers over the swamp water, trying to lure Swamp Thing out. When Constantine threatens to harm the posies, vine tendrils begin to rise up out of the water and… the screen goes black.Moderator Gary Miereanu pulled the plug so that audiences would be sufficiently teased enough to go buy the movie when it comes out in early 2017.The fan Q&A offered a few interesting tidbits.

Joshua is IGN’s Comics Editor. If Pokemon, Green Lantern, or Game of Thrones are frequently used words in your vocabulary, you’ll want to follow him on Twitter @JoshuaYehl and IGN