Here's a 1972 marketing ploy that you have to say is unique: pairing the exploitation horror film Blacula with the appropriately-named Jim Brown action pic Slaughter - and promoting the pair as perfect for the Christmas/New Year's season. After all, what says "Peace on Earth" more than a blood-sucking fiend who rises from the dead and a gut-busting, sex-obsessed private dick who takes no prisoners?
