The original ending of Todd Phillips' Joker had Arthur Fleck give himself similar facial scars to the ones that Heath Ledger had in The Dark Knight.

The ending of the film (spoilers ahead) is one of the most universally disliked aspects of Joker: Folie a Deux, a miserable end for Arthur Fleck and the alleged birth

There are few greater examples of this than Heath Ledger’s take on The Joker in 2008’s The Dark Knight. Ledger took the Clown Prince of Crime and took away anything fancy or shiny. This was not a man who made clues based on Looney Tunes animators and could kill you with a pie.