Movies.com spoke with him about the "curse":
Have you heard of the "Superman curse"?
Cavill: I have indeed heard of the curse. Well, I mean, I honestly don't believe there's a curse. I think there's been some bad luck in the past, especially when it comes to horses, and I don't mean that as a joke. My fiancée is an international show jumper and all the rest attached to that: you can fall off 1,000 times and be fired through fences and then the one time you're home out in the yard, all it takes is something to startle the horse and you're off and you fall the wrong way. There's bad luck, but I don't think it's any curse.
The Red Sox beat the thing after 80 years.
Cavill: That's right, yes.
The curse is meant to be broken.
Cavill: Yes, when I'm 80 years old, it'll be grand.The film hits theaters on 14 June.