Justice League is the team of DCEU (detective comice extended universe) comics superheroes. Based on this comic series a movie with the same name was released in 2017. It had a troubled production history.
Originally, the Justice League movie was being directed by Zack Snyder. He already has some big movies like 300 , Watchmen , Man of Steel , Batman v Superman: Dawn of Justice, on his name.
By January 2017, he had the 4 hour cut of the movie justice league ready, which according to Warner Bros, had to be reduced to 2 hour (obvious for a movie). He whittle the movie down to 2 hour 20 min before screening the film for the studio. According to Snyder, everyone agreed that the movie still require some work & final touch before it could be released in cinemas.
Around May during post-production of the movie Zack had to step down and had to leave due to an unfortunate tragedy in the family.
Warner Bros, recruited Joss Whedon to finish Justice League by its scheduled November 2017 release date. Whedon was the successful director of movies The Avengers (2012) and its sequel Avengers: Age of Ultron by then. Due to all these , there were changes in the original production of the movies. Some scenes where re-shooted, script changes etc.
The result was the mishmash of the movie. Snyder and Whedon have radically different styles.
The final movie released met with mixed reactions from fans and audiences. In all, as compared to Marvel’s initial movie, Justice League was a failure and had a bad impact on the DCEU franchise.
After 2 years, with the coordinated effort, the director and actors behind Justice League revived the Snyder cut campaign in 2019. Snyder’s version of the Justice League movie became the most Tweeted about movie Warner Bros. has ever made—even though it has never actually been released.
The result of this Snyder personally confirmed its polished uncut 4-hour movie releasing on 18th March 2021.
What we can expect to see additionally?
1.) Little detailed backstory of flash , cyborg , first invasion on earth and dardsied
2.) The enhanced vfx effect in final battle in Pozharnov Russia.
3.) Post credit end scenes.