The famous Batman's Martha moment in Batman v Superman: Dawn of Justice might've been heavily flawed, but its darker implications could've improved it. The 2010 animated film Batman: Under the Red Hood explores Batman's dilemma with killing and his code of ethics. Batman v Superman could have delivered a better climatic scene if it had considered Batman's character development from Under the Red Hood. The Dark Knight's films have always focused on the sacrifices required by his crime-fighting mission. Batman famously sacrificed his reputation to save Gotham City from chaos during Christopher Nolan's film trilogy. That being said, not every Batman movie has succeeded in depicting the character's self-sacrificial trait. The DC Extended Universe struggled to portray Batman's morality without diminishing his heroism.
Source：https://www.cbr.com/under-the-red-hood-fixes-martha-scene-batman-v-superman/
