Speaking with Business Insider, the Russo brothers asked which superheroes they think are the most difficult to translate on the big screen. The two unanimously chose the Man of Steel with Joe explaining "He's a very difficult character. You have to find an emotional flaw or weakness in the character in order to make them vulnerable." His older brother, Anthony, meanwhile, further explained by saying that typically, the more powerful a hero is, the tougher it is to make him compelling.
"The more powerful a character is, the more difficult to deal with that character on a narrative level. As storytellers, and the way we explore characters, we always look for vulnerabilities in characters because that's where characters become interesting. They're superficially interesting in their strength, but they get much more depth when you find where they don't have that kind of strength. In general, the more powerful a character is, the more tricky that is."