You can see a trailer for Dark Knight here.
Personally, I'm looking forward to the movie. It's interesting to see the "toyetic" parts of the Batman franchise coming to a crossroads with the post-Crisis/ first appearance of Joker interpretation of the Clown Prince of Crime. That's more or less what I want my Batman to be on the screen. Now, if they could just work in a Norm Breyfogle designed Batmobile.
If only they had taken a page from Morrison's book and done the Joker a bit more like the chap in "Arkham Asylum".
Anything is better than the Joker now appearing in Salvation Run. It's like Willingham wasn't even really trying.