This includes some major set up and footage from the newcomers to the DCEU.
Zack Snyder has certainly taken note of the Snyder Cut movement, often thanking fans for their support and sharing new images on Vero from his Justice League.
For instance, Willem Dafoe and Kiersey Clemons filmed scenes as Nuidis Vulko and Iris West respectively, with both of their roles being cut for the theatrical cut.
Plenty of content was left on the cutting room floor when Joss Whedon came into complete the project in time for its planned release date.