Holy crap.
I find it striking, comic-accurate (hair, lips, etc), with some fresh new additions (love the teeth. Makes him seem nuts), but there's also a bit of tackiness going on. The idea of tattoos is fine, but since they're Joker references, it makes it seem like something a Joker fan would have, not the Joker himself.
The best thing about it though is how I get the sense that Leto is going to kill it.