Fielding a fan question at today’s WonderCon panel for his upcoming Pacific Rim, Guillermo del Toro offered a few details about his in-development DC Universe project, Dark Universe (He also hinted that it may ultimately be called Justice League Dark).

Del Toro has written a story bible for the film and they have a writer to adapt the screenplay that they hope to announce very shortly. The project won’t happen, however, until after del Toro’s next, the horror story Crimson Peak.

The film will follow John Constantine (who, Del Toro promises, will be blond this time) as its protagonist, and will include the previously-announced Swamp Thing, the Demon, Deadman, the Spectre and Zatanna as well.

“He is basically trying to recruit,” says Del Toro of the “Hellblazer” hero.

Though the film’s through-line will feature Jason Blood’s history with Merlin and the Knights of King Arthur, bringing a threat to present day.

Del Toro stressed that he didn’t want any of the heroes’ origins to be delivered up front and, instead, will be explored throughout the film.

“Swamp Thing is at peace with who he is,” says Del Toro, “but Deadman is still trying to find out who shot him.”

When Dark Universe ultimately heads to the screen is still anyone’s guess, but fans can catch Del Toro’s Pacific Rim in theaters July 12.