Zack Snyder’s Justice League more commonly known by fans as the ‘Snyder Cut’ is the alternate and original version of the Justice League that was released in 2017.
Fueled by his restored faith in humanity and inspired by Superman’s selfless act, Bruce Wayne enlists the help of his newfound ally, Diana Prince, to face an even greater enemy. Together, Batman and Wonder Woman work quickly to find and recruit a team of Metahumans to stand against this newly awakened threat. But despite the formation of this unprecedented league of heroes – Batman, Wonder Woman, The Flash, Aquaman and Cyborg. – it may already be too late to save the planet from an assault of catastrophic proportions.
Behind the ScenesEdit
Shortly after filming had finished for Man of Steel, Warner Bros hired Will Beall to script a new Justice League film. Warner Bros. president Jeff Robinov explained that Man of Steel would be "setting the tone for what the movies are going to be like going forward. In that, it's definitely the first step." The film included references to the existence of other superheroes in the DC Universe, and setting the tone for a shared fictional universe of DC Comics characters on film. David S. Goyer stated should Green Lantern appear in a future installment, that it would be a rebooted version of the character and not connected to the 2011 film. With the release of Man of Steel in June 2013, Goyer was hired to write a sequel, as well as a new Justice League, with the Beall draft being scrapped. The sequel was later revealed to be Batman v Superman: Dawn of Justice, a team up film featuring Ben Affleck as Batman, Gal Gadot as Wonder Woman, and Ray Fisher as Victor Stone / Cyborg in a minor role that will become more significant in leading up to the proposed Justice League film. The universe is separate from Nolan and Goyer's work on The Dark Knight trilogy, although Nolan is still involved as an executive producer for Batman v Superman. In April 2014, it was announced that Zack Snyder would also be directing Goyer's Justice League script. Warner Bros. was reportedly courting Chris Terrio to rewrite Justice League the following July, after having been impressed with his rewrite of Batman v Superman: Dawn of Justice. On October 15, 2014, Warner Bros. announced the film would be released in two parts, with Part One releasing on November 17, 2017, and Part Two on June 14, 2019. Snyder will direct both films. In early July 2015, EW revealed that the script for Justice League Part One had been completed by Terrio.
In April 2014, Ray Fisher was cast as Victor Stone / Cyborg and was set to cameo in Batman v Superman: Dawn of Justice followed by a larger role in Justice League. Henry Cavill, Ben Affleck, Gal Gadot, and Amy Adams are also expected to reprise their roles from Batman v Superman: Dawn of Justice. In October 2014, Jason Momoa was cast as Arthur Curry / Aquaman and debuted as the character in Dawn of Justice. On October 20, 2014, Momoa told ComicBook.com that the Justice League film would be coming first and that is what they were preparing for, and he did not know if the solo Aquaman film would be prior to Justice League or post. He thought it might be the origin of where Aquaman came from. On January 13, 2016, The Hollywood Reporter announced that Amber Heard was in negotiations to appear in the film as Aquaman's love interest Mera. In March 2016, producer Charles Roven said that Green Lantern would not appear in any film before Justice League Part Two, and stated that they "could put Green Lantern in some introduction in Justice League 2, or barring that, a movie after." Also in March, The Hollywood Reporter announced that J. K. Simmons was cast as Commissioner James Gordon, and Heard was confirmed to join the cast as Mera. Adams also confirmed that she would reprise her role as Lois Lane in both Justice League films. The following month, Simmons confirmed that he would play Gordon. By April 2016, Willem Dafoe was cast as Vulko, another Atlantean. Despite the death of his character in Dawn of Justice, Cavill confirmed that he would return for both Justice League films. In May 2016, Jeremy Irons confirmed he will appear as Alfred Pennyworth. That same month, Jesse Eisenberg stated that he would reprise his role as Lex Luthor.
On May 20, 2020 Zack Snyder announced with WB that they are completing Zack’s cut of Justice League with a budget of possibly 20-30 million to complete with the returning cast and crew. They plan to release it in WB’s new streaming platform HBO Max in 2021. 
After completing most of the filming for Justice League back in 2016, Snyder had to leave his directing duties due to a family tragedy so Warner Bros. hired Joss Whedon to finish filming and do the films reshoots. This lead to Whedon changing most of the film and reducing the runtime dramatically due to the high demand from the studio.
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