This is the trailer for the 2021 superhero epic movie "Zack Snyder's Justice League", the Director's Cut version of the 2017 epic superhero movie "Justice League", the fifth movie in the DCEU (DC Comics Extended Universe) and the sequel to the 2016 superhero epic "Batman Vs. Superman: Dawn of Justice".

This was the version that Snyder intended before he stepped down from production in 2017 due to the suicide of his daughter Autumn. Joss Whedon was hired to direct the rest of the movie.

After spending $70 million dollars in effects and reshoots, the movie was released through Warner Bros. Pictures through their streaming service HBO Max on March 18, 2021.

Five thousand years ago, Darkseid (Ray Porter) and his Parademon army attempt to conquer Earth using the three Mother Boxes. They are foiled by a coalition of Old Gods, Amazons, Atlanteans, humans, and a Green Lantern, leaving behind the Mother Boxes, which are hidden separately. In the present, Superman/Clark Kent's (Henry Cavill) death triggers the Boxes' reactivation, attracting Steppenwolf, Darkseid's disgraced lieutenant. Steppenwolf (Ciaran Hinds) aims to regain Darkseid's favor by gathering the boxes to form "The Unity", which would terraform Earth into a copy of Apokolips, their homeworld.

Steppenwolf fights the Amazons on Themyscira and takes the Mother Box guarded by them. Diana Prince/Wonder Woman (Gal Gadot) receives a warning from the Amazons, then learns about Darkseid's assault on Earth and Steppenwolf, informing Bruce Wayne/Batman (Ben Affleck). The two seek to form a team of metahumans to protect Earth. Having previously failed to recruit Arthur Curry/Aquaman (Jason Momoa), Bruce locates Barry Allen/The Flash (Ezra Miller), while Diana locates Victor Stone/Cyborg (Ray Fisher). Barry joins while Victor refuses until his father Silas (Joe Morton) and other S.T.A.R. Labs employees are kidnapped by Parademons seeking the Mother Box the humans hid. Steppenwolf kidnaps and slaughters Atlantean Guards watching over their Mother Box and takes it with only Mera (Amber Heard) and a reluctant Arthur left to guard it.

The team receive intel from Gotham City Police Commissioner James Gordon (J.K. Simmons), leading them to Steppenwolf's army in an abandoned underwater facility. Although the team rescues the kidnapped employees, the facility is flooded, trapping them until Arthur helps them escape. Victor retrieves the last Mother Box, which he had hidden. He reveals that it was used to rebuild his body after a car accident, explaining that the Boxes can rearrange matter at the will of their masters. The group realizes that they could use the Box to resurrect Superman, though Steppenwolf will inevitably discover it as a result. Meanwhile, Steppenwolf receives a vision of the Anti-Life Equation, a secret power sought by Darkseid to control all of existence, and he informs his master. The team exhume Superman's body and place it in the amniotic fluid of the genesis chamber in a Kryptonian ship. After Barry activates the Mother Box, an amnesiac Clark Kent is resurrected, attacking the group after Victor's cybernetics target him in self-defense. Before he can kill Bruce, Lois Lane (Amy Adams) arrives and calms Clark down, and they go to his family home in Smallville, where he regains his memories.

Steppenwolf retrieves the last Mother Box, but not before Silas sacrifices himself to supercharge it with laser heat, allowing Victor to track it. Without Superman, the five heroes travel to an abandoned Russian city, where Steppenwolf aims to form the Unity. They fight their way through the Parademons and Superman arrives and subdues Steppenwolf, but Victor fails to separate the boxes. The Unity is formed, destroying the planet. Barry enters the Speed Force before the shockwave reaches him, reversing time to give Victor the necessary charge that allows him and Superman to separate the Boxes. The team kills Steppenwolf, throwing his body to Darkseid's feet back on Apokolips through a portal. Darkseid vows to return to Earth to complete his quest for the Anti-Life Equation.

After the battle, Bruce, Diana, and Alfred Pennyworth (Jeremy Irons) agree to set up a headquarters for the team at Wayne Manor. Barry acquires a job in Central City's police department, Victor is inspired by an audio message left by Silas to use his abilities for good, Arthur goes to see his father,[e] and Clark resumes his life as a reporter and Superman.

In the epilogue, Lex Luthor (Jesse Eisenberg) has escaped from Arkham Asylum and is visited by Slade Wilson (Joe Manganiello), to whom Luthor reveals Batman's secret identity. After waking up from a cryptic dream of the future,[f] Bruce receives a visit from Secretary of Defense Calvin Swanwick (Harry J. Lennix), who is revealed to be the Martian Manhunter. He thanks Bruce for assembling the team before promising to be in contact to prepare for Darkseid's return.