In February 2007, it was announced that Warner Bros hired husband and wife duo Michele and Kieran Mulroney to write a script for a Justice League film.

[3] Titled Justice League: Mortal,[4] Michele and Kiernan Mulroney submitted their script to Warner Bros. in June 2007, receiving positive feedback,[5] which prompted the studio to immediately fast track production in the hopes of filming to begin before the 2007-2008 Writers Guild of America strike.

[8] Jason Reitman was the original choice to direct Justice League, but he turned it down, as he considers himself an independent filmmaker and prefers to stay out of big budget superhero films.

[13] The following month roughly 40 actors and actresses were auditioning for the ensemble superhero roles, among them were Joseph Cross, Michael Angarano, Max Thieriot, Minka Kelly, Adrianne Palicki, and Scott Porter.

[18] The script for Justice League: Mortal would have featured John Stewart as the Green Lantern, a role originally offered to Columbus Short.

[19] Hip hop musician Common was cast,[20] with Adam Brody as The Flash / Barry Allen,[21] and Jay Baruchel as the lead villain, Maxwell Lord.

Gregory Noveck, senior vice president of creative affairs for DC Entertainment stated "we’re going to make a Justice League movie, whether it’s now or 10 years from now.

The theatrical version of a live action Justice League movie was released in November 2017 and received mixed reviews from critics and earned over $657 million worldwide.

[35][36][37][38][39][40][41][42] The film stars Ben Affleck as Bruce Wayne / Batman,[43][44] Henry Cavill as Clark Kent / Superman,[45] Gal Gadot as Diana Prince / Wonder Woman,[46][47][48][49] Ezra Miller as Barry Allen / The Flash,[50] Jason Momoa as Arthur Curry / Aquaman[51] and Ray Fisher as Victor Stone / Cyborg.

[62] This version presents Snyder's original vision for a Justice League film with a more grounded and darker tone as well as an overall aesethetic more in line with Snyder's previous DCEU films Man of Steel and Batman v Superman: Dawn of Justice rather than the lighter, more family friendly tone of the 2017 theatrical cut and features a radically overhauled ending.