I don't like it. I don't like it at all. He looks like the kids you'd see shopping inside Hot Topic ten years ago. Those tattoos are so generic and unimaginative and don't at all look like something The Joker would subject himself to. Yuck.
The appearance sucks, but his demeanor may turn out fine, and the actor may do a fine job portraying him, although I don't see how he could beat Heath Ledger's portrayal in The Dark Knight.