Griswold Goes Gotham.

"It's really a great role. I'm in throughout the whole movie, and I'm really looking forward to working with Christian and Morgan and all these real Hollywood heavy hitters." Um, who is Anthony Michael Hall playing in The Dark Knight? "'I signed a confidentiality agreement, and I can't say which part I'm playing because it affects the story,' says Hall.'" Some sites have suggested he's [spoilers] playing a vigilante Batman, likely one who gets snared by the Joker, although that wouldn't explain why his scenes seem to involve Morgan Freeman (Lucius Fox).