Zack Snyder's Justice League (colloquially referred to as the Snyder Cut) is the 2021 director's cut of the 2017 American superhero film Justice League, the fifth film set within the DC Extended Universe (DCEU) based on the team of the same name appearing in DC publications. It is intended to match director Zack Snyder's original vision for the film, prior to his departure from the production and subsequent studio interference.
https://en.wikipedia.org/wiki/Zack_Snyder%27s_Justice_League