Cavill acknowledged that had he known what was going to happen with Justice League, he would have made a “difference choice” with his Fallout look.
Because Justice League’s reshoots coincided with when Fallout was still shooting, Cavill was unable to shave his mustache when he reprised Superman.
The decision for Henry Cavill to grow a mustache for the role of August Walker in Mission: Impossible – Fallout wasn’t given a lot of thought, but the facial hair would have enormous ramifications for the actor on Justice League.
As a result, the mustache had to be CGI’d out for numerous scenes in Justice League’s final cut, and the end result… did not look great, to put it lightly.