Here's a cool video detailing Rhythm & Hues' efforts getting dead Marlon Brando to do a few lines in Superman Returns. This is roughly 9 billion percent more effort than Marlon Brando himself put into the role, if you listen to the DVD commentary track on the first Superman director Richard Donner playfully recounts how there were index cards with lines on just about everything because Marlon wanted the "read to be fresh for the screen."
Nice work if you can get it.

Marlon Brando in Superman Returns [aintitcool]