Here's a new DNC web ad featuring Gingrich, Perry and Huntsman all tearing Romney apart for the devastation caused by Bain Capital:
The Dark Knight Rises. Bane. Summer 2012.
Mitt Romney. Bain Capital. November 2012.
I'm not a genius at these things, but this seems ready-made.
Here's a blank for anyone interested in goofing around with it themselves:
And in case you haven't seen the trailer yet, there appears to even be an interesting #Occupy angle to it (at least from Anne Hathaway's Catwoman, anyway); listen for it at around 50 seconds in: