For a Xmas gift, I received 'The Spider-Man Chronicles', which is a book about the making of the Spider-Man 3 movie. It's a richly detailed tome complete with photos and illustrations and it gives you behind-the-scenes info from script to screen.
One thing I didn't know was that the Vulture was the first choice to be Sandman's partner in crime. Ben Kingsley even read for the part. Of course, the script changed and the Vulture was shelved for Venom.
Here's my take on what Kingsley might have looked like as Spidey's adversary.