As my younger brother surfed the vast community which is YouTube he came a crossed a video about the new game Batman: Arkham Knight. As you can see in the picture below Jason Todd is strapped into a chair and being tortured by the Joker. If you look closer at the screen you can see a faint "J" under the left eye of Jason. The Joker branded this J before killing him. It looks an awful lot like the J that is "tattooed" on Jared Leto's new Joker in Suicide Squad.
Coincidence? I think not