Joss Whedon made so many changes to Justice League that it's impossible to be 100% sure what Zack Snyder's version of the movie looked like, but the early trailers did provide at least some clues. In the final battle, for example, the sky was supposed to be an alien blue colour, but The Avengers helmer changed that and bathed the characters in an "Apokoliptian" red.
Previously, Justice League cinematographer Fabian Wagner has confirmed that the decision to make everything red came about after Whedon took charge, but if the Vero exchange below is any indication, Snyder plans to restore the final act to how it was supposed to look.
Why is the colour of the sky a big deal? Well, common sense says that Snyder wanted to save those red skies for when Darkseid invades Earth, and it's definitely interesting to think about how many other visual changes like this he plans on making. For the most part, though, fans are anxious to see how the story transforms (something tells us that Russian family will be M.I.A.).
Check out Snyder's comments below, and stay tuned for more on his version of Justice League!
VERO: Zack Snyder's Justice League will not have red sky in the third act. from r/DC_Cinematic