"Justice League" (2017) and "Zack Snyder's Justice League" (2021) are not the same movie, though they share the same core story and characters. The 2017 version was directed by Joss Whedon and features significant edits and reshoots, resulting in a runtime of about 2 hours. The 2021 version, directed by Zack Snyder, is a four-hour director's cut that restores his original vision, including additional scenes, character development, and a darker tone. Both films are part of the DC Extended Universe but present different interpretations of the same narrative.

There are two "Justice League" movies due to the tumultuous production of the original 2017 film directed by Zack Snyder. After Snyder stepped down during post-production due to a family tragedy, Joss Whedon was brought in to complete the film, resulting in significant rewrites and reshoots. This led to a version that many fans felt did not align with Snyder's vision. In 2021, HBO Max released "Zack Snyder's Justice League," a four-hour cut that restored Snyder's original vision, featuring additional scenes and character development, thus creating two distinct versions of the film.

"Justice League" (2017) is the theatrical cut directed by Joss Whedon, which was heavily edited and altered from Zack Snyder's original vision. It runs for about 2 hours and includes lighter tones and more humor. Zack Snyder's Justice League, released in 2021, is a four-hour director's cut that restores Snyder's original narrative, character development, and visual style. It features additional scenes, deeper backstories, and a darker tone, including the introduction of new characters and subplots. The 2021 version is widely regarded as a more cohesive and complete film.

As of now, there are no confirmed plans for a "Justice League 2." Following the release of "Zack Snyder's Justice League" in 2021, which was a director's cut of the original 2017 film, discussions about a sequel have been speculative. DC Studios has been exploring new directions for its cinematic universe under new leadership, with projects like "The Flash" and "Aquaman and the Lost Kingdom" in the pipeline. However, a direct sequel to the Justice League film has not been officially announced.