Originally Posted by JosephCAW
I'd guess its real, Zod does say in the trailer that he's traveled very far through space, so it could be a mass variety of alien skulls, Kryptonian and Human included
This could be very true. Just a horde of skulls he has collected on his ship while looking for Kal-El. It's such a horrid image and something you'd never expect to see in a Superman film. I love it, a picture is worth a thousand words in this case.