There's a site called worth1000.com. It ran a contest called Superhero ModRen. People were invited to take a renaissance painting and photoshop in a superhero or villain. Three different entries portrayed Michaelangelo's David as Superman. I liked this one the best, but that's just me. Looking at that statue from the front, it's easy to forget that it's actually a portrayal of David of David and Goliath fame. Once around back, you can see the sling draped over his shoulder in detail, and the story comes into focus. He was supposed to be perfection, I guess, as is Superman. He sired a line of kings that putatively lasted until Jesus.
In a related story, my wife Mandy and I went to see that statue in Florence. Waiting in line, a pigeon pooped on her head.