Zack Snyder’s Justice League ending explained

Zack Snyder's Justice League
(Image credit: HBO Max/Warner Bros.)

Spoilers follow for Zack Snyder’s Justice League.

Zack Snyder’s Justice League has arrived on HBO Max, and Sky Cinema and Now TV, in the US and UK respectively, and we’re sure you have questions about its ending. The Snyder Cut’s climax is different to 2017’s theatrical cut in a few ways and, given how it’s structured, you may be slightly confused about what’s going on and how the movie closes out.

We’ll be diving into what the ending means in this article, and we'll cover the key plot points in case you want further analysis of what happened. Just so we’re clear, there are huge spoilers for the Snyder Cut after the image below. If you haven’t finished it, or even started watching for that matter, now is the time to turn back.

What happens during the final battle in Zack Snyder’s Justice League? 

Zack Snyder's Justice League

(Image credit: HBO Max/Warner Bros.)

Throughout Zack Snyder's Justice League, Steppenwolf has sought out the Mother Boxes that Darkseid left on Earth after his previously failed attempt to conquer it. In the DC Extended Universe (DCEU), combining three Mother Boxes - a process known as ‘synchronization’ - into a single entity is called the Unity. The Unity has the power to terraform planets into worlds similar to that of the Mother Boxes’ master: in Darkseid and Steppenwolf’s case, any Unity event transforms planets into a replica of their home world, Apokolips.

After Steppenwolf acquires them all, he returns to his stronghold and begins the synchronization process. In a last-ditch bid to stop him, Batman and friends hatch a plan to separate them using a combination of Cyborg’s and The Flash’s abilities. Running as fast as the speed of light, The Flash will whip up an electric charge big enough to allow Cyborg to enter the synchronization, rip the Mother Boxes apart and save Earth. Meanwhile, Batman, Wonder Woman, and Aquaman will deal with Steppenwolf and his army of Parademons.

With his memories having returned - and kitted out in his new black suit - Superman arrives to help. As Cyborg hacks into the Mother Boxes, however, the plan falls apart. The Flash, who has been running laps outside to build up his electric charge, is hit by a Parademon cannon. Unable to heal himself in time to reach the rest of the group, he doesn’t supercharge Cyborg and the Unity is completed. Darkseid arrives via a portal behind the group and, in the blink of an eye, the Unity unleashes a gigantic wave of energy across the planet that destroys all life and terraforms Earth.

Zack Snyder's Justice League: how do The Flash and Cyborg reverse the Unity? 

Zack Snyder's Justice League

(Image credit: HBO Max/Warner Bros.)

It seems that the Justice League have failed - or have they? The Flash, now healed from his wound, decides to break his only rule regarding his powers. Running faster than the speed of light, he begins to turn back time. The terraforming of Earth is reversed, the Justice League - killed in the Unity’s explosion - are brought back to life, and The Flash returns time to a point before the Unity is completed. Barry Allen supercharges Cyborg, who enters the synchronization.

Inside, Cyborg is greeted by an illusion of his parents and his former human self. The imaginary trio try to convince Cyborg to join them but, rejecting his former life, he pulls them apart. The illusion is revealed to be the three Mother Boxes in ‘physical form’ and, with Superman’s help in the real world, Cyborg halts the synchronization. As the Mother Boxes fall to the ground, an enraged Steppenwolf cries out, but his screams are short-lived. He’s impaled on Aquaman’s trident, punched towards Darkseid’s portal by Superman, and beheaded by Wonder Woman as his lifeless body lands at Darkseid’s feet. The Justice League looks on as Darkseid’s portal closes.

Has the Justice League succeeded in the Snyder Cut? 

Zack Snyder's Justice League

(Image credit: HBO Max/Warner Bros.)

Yes - but there’s a caveat. Zack Snyder’s Justice League ends in a similar fashion to the 2017 theatrical cut, with each hero getting their moment in the sun. Bruce Wayne buys the Kent farm back for Clark and his mother Martha after it was repossessed by the bank, and Barry Allen - aka The Flash - gets a job in Central City’s Police Department. Diana Prince (Wonder Woman) joins Bruce at Wayne Manor to formally set up the Justice League's headquarters, while Arthur Curry, or Aquaman as we know him, returns to Atlantis to assume his title as King of the Seas.

There are some changes to Snyder’s ‘happy’ ending, though. Rather than step back from her heroic duties, Diana forlornly looks out across the ocean towards Themyscira, and wonders if her home, family and friends survived Steppenwolf’s assault. Meanwhile, Victor Stone - aka Cyborg - reassembles his deceased father’s dictaphone and restarts the message that he refused to listen to earlier. This differs from the theatrical cut, which saw Cyborg and a still-alive Silas Stone explore the former’s abilities at S.T.A.R Labs.

We also get that post-credits scene, which was part of the theatrical cut, involving Lex Luthor (Jesse Eisenberg) - who has escaped Arkham Asylum - and Deathstroke (Joe Manganiello) on board the former’s yacht. The sequence is a little different this time, however, teasing the film that would've been The Batman starring Ben Affleck, rather than a second Justice League movie. 

However, while that short sequence brought the 2017 film to an end, save for Superman and The Flash’s race, Zack Snyder’s Justice League has two final moments to share. Read our explainer on the Justice League epilogue here, and find out more about the appearance of the Martian Manhunter, too. 

Senior Entertainment Reporter

As TechRadar's senior entertainment reporter, Tom covers all of the latest movies, TV shows, and streaming service news that you need to know about. You'll regularly find him writing about the Marvel Cinematic Universe, Star Wars, Netflix, Prime Video, Disney Plus, and many other topics of interest.

An NCTJ-accredited journalist, Tom also writes reviews, analytical articles, opinion pieces, and interview-led features on the biggest franchises, actors, directors and other industry leaders. You may see his quotes pop up in the odd official Marvel Studios video, too, such as this Moon Knight TV spot.

Away from work, Tom can be found checking out the latest video games, immersing himself in his favorite sporting pastime of football, reading the many unread books on his shelf, staying fit at the gym, and petting every dog he comes across. Got a scoop, interesting story, or an intriguing angle on the latest news in entertainment? Feel free to drop him a line.

Read more
A Creature Commandos collage image showing Ilana, Nina, and The Bride
Creature Commandos season 1 ending explained: who dies, is there a post-credits scene, will there be a season 2, and more of your biggest questions answered
Joaquin Torres and Sam Wilson running on a warship in Captain America: Brave New World
Captain America: Brave New World ending explained: does Sam Wilson beat Red Hulk, is there a post-credits scene, are there any Marvel cameos, and more big questions answered
A screenshot of David Corenswet's Man of Steel suiting up in a Metropolis apartment while a pink lazer is fired in the background in 2025's Superman film
James Gunn's Superman movie: release date, trailer, confirmed cast, plot synopsis, and more news on the first DCU Chapter One film
A screenshot of the official poster for James Gunn's Superman movie, which shows the titular hero flying into the sky
DCU Chapter One: every upcoming DC movie and TV show plus known release dates
Weasel, Nina, The Bride, and Doctor Phosphorus wearing prison clothes in Creature Commandos episode 4
Creature Commandos episode 4 reveals the DCU's Justice League for the first time, but its showrunner has a warning for fans who might 'infer' anything from it
A bloodied and crying Mark Grayson in the Invincible season 3 finale
Invincible season 3 ending explained: is [spoiler] dead, Damien Darkblood end credits scene, will there be a season 4, and more big questions answered
Latest in Entertainment
Trinity Rodman #2 of the Washington Spirit crosses the ball during a game between Bay FC and Washington Spirit at Audi Field on November 10, 2024 in Washington, DC.
National Women's Soccer League 2025: How to watch NWSL games live from anywhere
Irish boxer TJ Doheny receives an undercard bout, ahead of the WBO super welterweight world title fight in March, 2023
Ball vs Doheny live stream: how to watch the boxing from anywhere now, full undercard, start time, weigh-in results
Bruno Guimaraes of Newcastle United during the Carabao Cup Semi Final Second Leg match in February 2025
Liverpool vs Newcastle live stream: how to watch Carabao Cup final 2025 online, team news
The Russo brothers posing for a photograph and Herman carrying a Volkswagen camper van in The Electric State
'We're optimists': AI enthusiasts Joe and Anthony Russo defend its use in movies and TV shows, but admit there are 'very real dangers' around its application
Lando Norris driving around a bend during practice for the 2025 Australian Grand Prix
Australian Grand Prix 2025: How to watch this season’s first F1 race online from anywhere
A collage of Tom Holland's unmasked Spider-Man and Sadie Sink's Max in Stranger Things season 4
Marvel reportedly casts Stranger Things star Sadie Sink in Spider-Man 4, but I don't want her to tackle the roles she's rumored to play
Latest in News
Google Pixel 8a in aloe green showing
Google Pixel 9a benchmark link teases the performance of the upcoming mid-ranger
Quordle on a smartphone held in a hand
Quordle hints and answers for Monday, March 17 (game #1148)
NYT Strands homescreen on a mobile phone screen, on a light blue background
NYT Strands hints and answers for Monday, March 17 (game #379)
NYT Connections homescreen on a phone, on a purple background
NYT Connections hints and answers for Monday, March 17 (game #645)
Apple iPhone 16 Pro HANDS ON
Leaked iPhone 17 dummy units may have given us our best look yet at all four models
A super close up image of the Google Gemini app in the Play Store
It's official: Google Assistant will be retired for phones this year, with Gemini taking over