I was so looking forward to this, but in the end, I didn't bother picking it up.
The art is atrocious. I can kinda see The Joker's look here being inspired by Heath Ledger's TDK look, and that in itself is fine. No problem with that. The problem is that the art itself just looks like a dogs dinner. Scribbly, but not in a good way.
As for the story, I only skimmed it in the shop, but... meh. I can kinda respect what he's doing, showing that The Joker can be a playful trickster as well as a psychotic killer, but in the current climate, with all the hype around Ledger's dark portrayal, I think it's the latter that people have an appetite for right now.