Stepping in to shepherd the movie through post and the shooting of some additional scenes will be Joss Whedon, the Avengers filmmaker and creator of Buffy the Vampire Slayer. With Whedon's help, the movie is still on track for its Nov. 17 release date.

Snyder tells The Hollywood Reporter he is stepping away from Justice League, Warner Bros.’ all-star DC Comics superhero mega-movie that is in postproduction, in order to deal with the sudden death of his daughter. Snyder's wife, Deborah Snyder, who is a producer on Justice League, also is taking a break to focus on the healing of their family.

Superheroes have always been about doing the right thing in the hardest of circumstances. Now Zack Snyder, one of the biggest filmmakers in the genre and the director of Batman v. Superman: Dawn of Justice and the upcoming Justice League, finds himself in just such a situation.

The studio is fully behind the move. “What they are going through is unimaginable, and my heart — our hearts — go out to them," says Warner Bros. Pictures president Toby Emmerich.

“In my mind, I thought it was a cathartic thing to go back to work, to just bury myself and see if that was the way through it,” said an emotional Snyder in an interview Monday in his office on the Warner Bros. lot, with Deborah sitting by his side. “The demands of this job are pretty intense. It is all-consuming. And in the last two months, I’ve come to the realization … I’ve decided to take a step back from the movie to be with my family, be with my kids, who really need me. They are all having a hard time. I’m having a hard time.”

Snyder’s daughter Autumn Snyder died by suicide in March at age 20. Her death has been kept private, with only a small inner circle aware of what happened, even as the movie was put on a two-week break for the Snyders to deal with the immediate effects of the tragedy. Zack Snyder says he initially was eager to return to the film, which stars Ben Affleck, Gal Gadot, Jason Momoa and Ezra Miller.

One of the first things the studio floated was the possibility of pushing back the release date of the movie, but the Snyders decided against that. Warners also extended Snyder's first-look deal to give him time to work on other planned projects when he returns to work.

Snyder, after screening a rough cut of Justice League for fellow filmmakers and friends, wanted to add additional scenes, so he brought Whedon on board to write them. But as he prepared to shoot the scenes in England, Snyder realized it was not the time to leave home. “The directing is minimal and it has to adhere to the style and tone and the template that Zack set,” says Emmerich. “We’re not introducing any new characters. It’s the same characters in some new scenes. He’s handing the baton to Joss, but the course has really been set by Zack. I still believe that despite this tragedy, we’ll still end up with a great movie.”

This isn’t the first time that Warner Bros. has had to deal with the unthinkable affecting a high-profile DC movie. In 2008, Heath Ledger passed away after shooting had wrapped for The Dark Knight but prior to the movie being finished and released. The tragedy put the studio and filmmaker Christopher Nolan in a very delicate position of balancing mourning with the demands of releasing a tentpole.

The internet and comic book movie fans being what they are, Snyder already is anticipating what some DC loyalists may think.

“Here’s the thing, I never planned to make this public,” he says. “I thought it would just be in the family, a private matter, our private sorrow that we would deal with. When it became obvious that I need to take a break, I knew there would be narratives created on the internet. They’ll do what they do. The truth is … I’m past caring about that kind of thing now.”

The death of Autumn, Zack's daughter from his first marriage, to Denise Snyder (in addition to Autumn, he and Deborah have been raising seven kids and step-kids), has brought a new perspective and a new focus for him. “I want the movie to be amazing, and I’m a fan, but that all pales pretty quickly in comparison," he says. “I know the fans are going to be worried about the movie, but there are seven other kids that need me. In the end, it’s just a movie. It’s a great movie. But it’s just a movie."

Autumn, who was attending Sarah Lawrence College, loved “to write, to write, to write,” says Deborah. Their daughter had written a sci-fi fantasy novel in the first person. It featured a character who was an outsider and who had trouble fitting in.

Deborah is holding on to the thought that she was the first person her daughter gave the book to read, even now as the story takes on a new meaning under the circumstances. “You’re hearing her voice,” Deborah says, fighting back tears.

The Snyders would like to some day see that manuscript published, with the proceeds going to a charity. “In the end, she didn’t make it, but her character does, and I think there would be something cathartic for people,” says Zack.

The thought of his daughter’s writing prompts Zack to recall another memory. Autumn had a quote that she included in everything she wrote. (“Every. Single. Thing,” chuckles Zack.) It’s from author Chuck Palahniuk: “We all die. The goal isn't to live forever, the goal is to create something that will.”

“Maybe this helps,” says Zack.