This is the Superman part of the video interview:
How are you preparing for the role:
Cavill: At this early stage it’s just doing some foundation training. The guys from Gym Jones, Mark Dwight is training me. I’ve done about a month so far of foundation training. Really hard stuff, to get my body used to the real stuff, which is coming up soon. So at the moment it’s just getting my body in the right aesthetic shape.
I heard you’re filming in Chicago. Is that true?
Cavill: Possibly. I don’t know how much I can tell you.
Zack talked about how it’s gonna be very realistic. Is that something that excites you?
Cavill: I think it’s a great way to go, because superheroes themselves are so unrealistic that to add a realism to them just makes them easier to associate with and attaches more directly to a real life imagination.
The video also talks about Immortals, you can find the rest at the link