There is a theory swirling around that this Jared Leto Joker could quite possibly be Jason Todd.... *possible spoilers* If you look at some of the tattoos on this new take on Joker there is 2 in particular that raise some eyebrows.... 1 being on his right arm where it appears to be feathers possibly linking the days way back when he was Robin with Bruce. The 2nd is on his face where under his left eye is a "J". I mean this could symbolize the Joker, but on some takes of the event in which the Joker "kills" Jason he actually does brand his face with a "J".... So it could quite possibly be symbolizing those actions the Joker did to him... Another few pieces of evidence that could draw this theory is 1.)This is an older take on Batman so it could be possible. 2.)Obviously the former Robin suit of Jason's can be seen in the trailer. 3.) This Joker is soooooo much younger than Batman so maybe there is someone pulling the strings behind this???? Possibly a older Joker? I mean this was done in Batman Beyond Return of the Joker Animated Movie. Honestly I think it'd be a cool take and definitely an interesting story arc to be told, but time will tell!