Darkhorizons has posted a lengthy report that falls somewhere between a plot synopsis, a listing of spoilers and a script review. It confirms many of the recent reports, and debunks the ones that suggested this movie was a straight adaptation of 'Batman: Year Two.' It's a fascinating read, but not if you want to see this movie 18 months from now without being about 50% spoiled.
http://www.darkhorizons.com/news04/040108e.php
http://www.darkhorizons.com/news04/040108e.php