The result was Joss Whedon reportedly adding approximately 80 script pages worth of new material into Justice League, and only around 10% of what Zack Snyder shot being included in the final product. And while the theatrical cut of Justice League ran at exactly two hours, the Snyder Cut is significantly longer at 214 minutes, with notable differences in this version of the movie including Wonder Woman killing Steppenwolf, Darkseid actually appearing, General Swanwick being revealed as Martian Manhunter, the list goes on.
Article source: https://www.cinemablend.com/news/2490944/how-the-invisible-mans-director-feels-about-unseen-movies-like-the-snyder-cut