Whether you like it or not, the next version of the Joker to hit the extra large screen is an inked, unhinged insane person with a look that suits his ludicrous behaviour.
Jared Leto’s interpretation of the character has earned him a lot of criticism. Furthermore, going by the logic of the director, each one of the Joker’s tattoos has a history on the page. Therefore, it’s high time that we decoded precisely what each represents and where they appear on him.
On The Face
This one is embellished over his forehead. There’s a hypothesis that proposes that the tattoo was not self-inflicted, but was added as an indication of a moment of mediocrity. This means that it could either be the mark of one of Blackwater’s more over-fanatical gatekeepers (the trailers show Ike Barinholtz’s Alpha 01 guard to be your commonplace power tripper). The way that Mr. J is then seen tormenting a person with a goatee could suggest he seeks revenge for that treatment. There’s also the possibility that the Joker IS Jason Todd and the Damaged tattoo was added as a brand by the genuine Joker as a consistent indication of what he did to him.
Proceeding with the Joker/Jason Todd hypothesis: the J marked on his cheek is outrageously reminiscent of the Arkham Knight revelation that shows Jason Todd to be alive. In that story, the Joker brands Todd with a J and convinces him that Batman did it.