“The black suit, you can say that in modern Krypton, when he left, everyone was wearing black suits.
Zack Snyder has also said that the original plan was to have Superman in the black suit in the first Justice League film and have him transition into his classic red and blue suit by the end of the third part of the intended trilogy.
In a recent interview, Snyder explained the significance of the black suit.
The trailers for Zack Snyder’s Justice League have shown just how different the look and feel of the “Snyder Cut” of Justice League is from the theatrical version that came out in 2017.