"It's ridiculous!" says Michael Shannon of the casting, "It just came out of nowhere. I'm talking to my agent and she goes, 'How about Superman?' 'What?' The idea that I would ever be in Superman. 'Are you serious?'"
"So I go meet him [Zack Snyder] and he's seriously sitting there and he's telling me - he's like 'You can't read the script, so I'm just gonna tell you what happens.' And he spent like a half hour telling me every scene in this movie...and then it's a month later, it's like 'OK, you're General Zod.'
‘Supergirl’ Is Finally Casting ‘Superman’, But There's a Catch
When Superman makes his first real appearance on ‘Supergirl’, we'll be in for a bit of a surprise.