|Charlie Brooks RPG Superstar 2015 Top 32|
The Joker there seems to be pulling a lot of inspiration from Grant Morrison's revamped Joker in "Batman RIP" (sans the missing lips and split tongue).
Also worth remembering that the Internet flipped when they saw the first picture of Heath Ledger's Joker.
That said, I'm still trying to figure out why you would want to introduce this new Joker in a movie that doesn't have Batman in it. The Joker typically doesn't work very well from a storytelling standpoint if he doesn't have a straight man (i.e., Batman) to play off of.
As to the Will Smith casting, I think he's got the acting chops to pull of Deadshot. I think the problem is that he almost always plays a likeable guy whereas Deadshot is a total psychopath.