MTV: ''While nothing further has been revealed about the in-development "Justice League" film, Guillermo Del Toro's "Justice League Dark" adaptation is coming together more and more each day. Earlier this week, while promoting "Pacific Rim" at WonderCon, Del Toro had this to say on the project: "The route we’re going is Constantine is our lead. Constantine is the guy who leads us in and out of the plot. We have Swamp Thing, Etrigan, we have Zatanna, we have the Floronic Man. We have stuff that those who love the darker side of the DC Universe are going to appreciate, and we’re trying to be true to the origins of the characters."
So the confirmed lineup for "Justice League Dark" (or "Dark Universe") thus far is Constantine, Deadman, Swamp Thing, the Spectre, Etrigan, Zatana, and, apparently, the Floronic Man. However, as DC fans know, there are still plenty of untapped supernatural characters within the DC Universe for Del Toro to utilize. That being said, we've taken the liberty of compiling a list of five more supernatural superheroes that could potentially pop up in the film.''