Mattel says of the line:
There will be 6 figures in total with a few chase versions thrown in. They will be 6 inches and sculpted by the Four Horsemen in scale with the DCUC figures. More details will come out next month at Toy Fair.
The Dark Knight opens on July 18, 2008, and stars Christian Bale, Heath Ledger, Morgan Freeman, Gary Oldman, Aaron Eckhart and Maggie Gylenhall.