“You wanna know how I got these scars?” So goes one of the most memorable lines in the history of Batman, expertly delivered by Heath Ledger’s Joker in 2008’s The Dark Knight. In 2022’s The Batman, Joker similarly makes an appearance at the end of the narrative and in a deleted scene. Meant to add to the terrifying nature of the character, the design brings up a massive issue that permeates media: the so-called “Evil Cripple” trope.
Source: How The Batman’s New Joker Spotlights Film’s Disfigured Bad Guy Trope