Fan CastingJustice League Dark (DCEU)

Exorcist and con man John Constantine and Jason Blood engage the Demons Three in a poker game for high-end stakes; Constantine offers his home, the House of Mystery, as his part of the pool in exchange for a box of artifacts, including a chipped Dreamstone. When both parties are caught cheating, Constantine summons Etrigan — a demon forced to share a body with Jason Blood — to dispatch the demons. Afterwards, Blood reprimands Constantine for making him summon Etrigan, and the two part ways. Days later, In Metropolis, Gotham and Washington, D.C., violent murders are committed by people who think their victims are demonic creatures before they are stopped by members of the Justice League. The League conclude that magic is the source of the crimes, but Batman is skeptical. However, at Wayne Manor, Batman is briefly possessed by Deadman and left with a single word ("Constantine") as a message. Batman finds Zatanna, who had a failed romantic history with Constantine, and Deadman possesses Batman once more to tell Zatanna that she and Batman need to see Constantine. The trio is attacked by a magically controlled tornado as they travel to meet Constantine at the House of Mystery. The group is joined by Black Orchid, the spiritual embodiment of the House, and decide to investigate the cause behind these supernatural occurrences. The heroes visit Ritchie Simpson, friend of Constantine and Zatanna, where they find shroud spirits of Death waiting to collect Ritchie's soul upon his upcoming demise. Simpson has cancer and is resentful towards Constantine for abandoning him to his fate, but loans them the Keshanti Key. Constantine and Zatanna use the key to view one of the victim's memories and discover he was possessed by an unknown entity. A magical creature is conjured to consume the man, but Batman, Deadman, Constantine and Zatanna narrowly escape and destroy it. Back at Ritchie's house, the team finds him close to death; Blood is also there to find the Dreamstone. Constantine chases after Blood while Batman gives an adrenaline shot to revitalize Ritchie. Upon being caught by Constantine, Blood explains that centuries ago the sorcerer Destiny possessed the Dreamstone in an attempt to overthrow Great Britain, using it to make people see their worst nightmares and feed off their torment. Blood was mortally injured cleaving the Dreamstone in half. Merlin summoned Etrigan to defeat Destiny and then bound him to Blood because Merlin knew they would be needed in the future. Ritchie briefly wakes to claim Felix Faust as his assailant. With the help of the plant elemental Swamp Thing (Alec Holland), the group locates Faust's Observatory of the Cosmos. After a battle with the wizard, which Faust loses, the team conclude Faust had no involvement in hurting Ritchie. Ritchie awakens and is revealed to have the other piece of the Dreamstone, which has been keeping his cancer in remission; he apparently destroys Black Orchid. Constantine tries to reason with Ritchie, that the Dreamstone (with Destiny's soul trapped inside) is using him. However, the Dreamstone takes over Ritchie's body and transforms him into Destiny. Destiny destroys the House and departs to start a frenzy; Zatanna saves the group, but passes out from the exertion. The Justice League tries to fight Destiny, but he causes them to perceive each other as demonic threats, so they attack each other. Etrigan attacks Destiny, but is separated back into Jason Blood and Etrigan. Constantine summons Swamp Thing, who attacks Destiny, while Batman and Zatanna disable the Justice League. Destiny rips Alec Holland's corpse from Swamp Thing, weakening him and breaking his will; Swamp Thing withdraws. Constantine tricks Destiny into bringing him and Deadman within his protective shield, allowing Deadman to wound Destiny. Blood, Constantine and Batman destroy the Dreamstone (and Destiny's body), and Ritchie is dragged to Hell as insurance that Destiny can't come back. Blood succumbs to his mortal wounds, and his body is buried near the place of his old village by Zatanna, Constantine and Etrigan. Zatanna agrees to join the League and offers Constantine a position as well. He declines, claiming Batman would not approve, but Zatanna states it was Batman's idea. The two return to the now-rebuilt House of Mystery, and Deadman joins the restored Black Orchid as her soulmate.