The Dark Knight writer, Jonathan Nolan, said during his appearance at SHOWSA that he would love to pen a fourth Batman film with Christian Bale.

“Wouldn't that be a dream… So if I had the chance to go back and work on that again, absolutely,” Nolan told the interviewer while he was promoting Fallout, for which he directed three episodes.

It may just be a dream… for now. There no plans for either of the Nolan brothers to revisit their massively successful movies, especially as we have a current Batman in Robert Pattinson. However, multiverses have always been possible in the realm of the superhero universe so it could happen.

Fallout writer Jonathan Nolan says it a fourth The Dark Knight film would be a dream

Fallout series poster next to an image of Vault Boy giving a thumbs up

Christopher Nolan is known to be very protective of his work with Batman. For Bale to return, the stars would have to align in many varied ways. But just the thought of the Nolan brothers reuniting to once again bring that world back to life would definitely be a dream come true for fans.

The Dark Knight has been acclaimed as one of the best superhero movies ever made. The film has many iconic moments, but there's one very memorable line that has Jonathan over his brother. You most likely know it: “You either die a hero, or you live long enough to see yourself become the villain.”

Christopher told Deadline, “I'm plagued by a line from The Dark Knight, and I'm plagued by it because I didn't write it.”

“My brother [Jonathan] wrote it. It kills me because it's the line that most resonates. And at the time, I didn't even understand it … I read it in his draft, and I was like, ‘All right, I'll keep it in there, but I don't really know what it means. Is that really a thing?' And then, over the years since that film's come out, it just seems truer and truer,” he explained.

At SXSW, Jonathan expounded on the story to The Hollywood Reporter.

“You either die a hero…”

“The first part of that line is ‘you either die a hero' — and that part's important, because not everybody wants to be a hero; it's engaging in heroics that puts you in this space, where you have this binary outcome. The idea is there are people who put themselves on the line and so often that wager turns on them,” he said.

“It's also that old idea of absolute power corrupting absolutely. It felt uniquely resonant to the tragedy of Harvey Dent and the tragedy of Batman. The fact that it resonates with people beyond the film is gratifying. I was proud of that line,” Nolan continued.

Nolan usually collaborates with his brother. Their first collaboration was on the 2000 film Memento, with Christopher directing as well. This combination was followed by 2006's The Prestige, the second and third Batman films in 2008 and 2012 and 2014's Interstellar. He also created the multiple Emmy Award-winning HBO series Westworld with his wife and producing partner Lisa Joy.