Shazam!'s David F. Sandberg has compared filming his superhero movie to "running a marathon" and revealed how bringing Billy Batson to life on the silver screen has taken its toll on him.

When a fan posted on Twitter and expressed their sadness at Sanberg and James Wan possibly wanting to take a break from superhero movies after Shazam! and Aquaman, Sandberg confessed, "It’s just that it takes a crazy amount of work to do a movie like this. It’s like asking a runner at the end of a marathon if they feel like doing another one."

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Based on the famous DC character, Sandberg's 2019 movie will connect to Warner Bros.' DC Extended Universe. Asher Angel will play the young Batson, while Zachary Levi portrays the character's heroic alter ego. However, despite hopes of a possible sequel, Sanberg isn't shying away from how tough it was filming Shazam!

While this might sound like bad news for hopes of a sequel or Sanberg returning for another entry, he rounded off his response by saying, "You need some time to rest and forget how difficult it was." Importantly, it's a case of never say never, and Sandberg hasn't officially said he's done with the world of Shazam.

Nevertheless, after Shazam! underwent a series of reshoots, it's a little easier to see why Sandberg might be feeling fatigued. So far, only Zack Snyder and Patty Jenkins have returned to helm more than one DCEU movie. Whatever Warner Bros. decides to do with its slate of superhero movies after big-name departures of Snyder and Henry Cavill, the likes of Gal Gadot, Jason Momoa and Levi seem to be sticking around in their various roles. Levi has said he hopes to join the Justice League at some point in the future, while fans already know that Shazam! will have connections to the larger DCEU.

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As it stands, Warner Bros. has made a name for itself with an extended wait between sequels, as movies like Suicide Squad 2 and Wonder Woman 1984 have been pushed from their original release dates. No one knows whether the studio is willing to wait for Sandberg or even move ahead with Shazam 2, but with the first movie scheduled to hit theaters on April 5, there isn't long to wait to see how Earth's Mightiest Mortal fares at the box office.

Arriving on April 5, 2019, director David F. Sandberg’s Shazam! stars Asher Angel as Billy Batson, Zachary Levi as Shazam, Mark Strong as Dr. Thaddeus Sivana, Djimon Hounsou as the ancient wizard Shazam, Grace Fulton as Mary Bromfield, Jack Dylan Grazer as Frederick “Freddy” Freeman, Ian Chen as Eugene Choi, Jovan Armand as Pedro Peña, Faithe Herman as Darla Dudley, Cooper Andrews as Victor Vásquez, and Marta Milans as Rosa Vásquez.