The team features some of the more supernatural characters in the DC Universe, handling mystical threats and situations deemed outside the scope of the traditional Justice League.

[6] Peter Milligan stated in an interview that he got the job for the book from his work on the 2011 Flashpoint: Secret Seven miniseries, and that he hoped to write something "emotionally dark" set in the DC Universe, comparing his characters to detectives, who struggle to cope with the things they see and have to do.

[7] The initial anticipation for this title has been good, with critics celebrating the fact that DC are willing to bring back some of the darker elements which had moved over to Vertigo in the 1990s.

[8] The opening story line involves the Enchantress' defeat of the Justice League, leading to the necessity of a more supernatural team to assist in these events, and detailing how they have come together.

[11] In his first story arc, Justice League Dark took residence in their new base, at the House of Mystery, and have started to show their links with the wider DC Universe, dealing with Steve Trevor and A.R.G.U.S.

[17] Additional magical characters from the DC Universe appeared in the series, like John Constantine and Doctor Fate, although initially not as members of the League.

[22][23][24][25] In the Knight Terrors story arc of 2023, the team members find themselves falling victim to the spells of Insomnia, becoming trapped by him within his Knightmare Realm.

Remaining awake through the chaos, Zatanna and Robotman team up to defend the unconscious Wonder Woman and Detective Chimp against Insomnia's Sleepless Knights, and the Sleeping Queen.

It would feature Deadman, the Spectre, the Swamp Thing, John Constantine, the Phantom Stranger, Zatanna, Zatara, Sargon the Sorcerer, and Etrigan.

Del Toro also added that his Constantine would not adhere to the continuity established in the television series, but he would consider incorporating elements from it, and even think about casting the same actor (Matt Ryan).

[87] In April 2015, del Toro said the script revision has been handed in and if there was availability in his schedule, he would direct it; if not, "somebody else will do it... [The film] needs to fall into the plan of the shared universe.

[94] In January 2020, Deadline reported that WarnerMedia and Bad Robot are working to create a Justice League Dark universe in film and TV.