The most shocking cameo came courtesy of the Kevin Costner, who of course played Pa Kent in Man Of Steel. When Superman loses his super-mojo and goes to find himself (or run away from his responsibilities - it's really not fleshed out enough to be all that clear), he encounters a ghost/memory of his father high on a mountain top. In a film full of silly visions and nightmares, it's unclear whether this is actually a dream or a hallucination or something else entirely, but Pa Kent does manage to convince his son to go back to being a happy hero by telling him a haunting story about accidentally drowning a load of horses. No wonder this is emo Superman. Kent's story also features a nod to comic staple Lana Lang, as it's her farm that he and Clark accidentally flood in his uplifting story.