Michael Shannon & Edgar Ramirez Up For "Superman: The Man Of Steel" Villain?

So it looks like both Michael "Boardwalk Empire" Shannon and Edgar "Bourne Ultimatum" Ramirez are reportedly up for the role of a villain in "Superman: The Man Of Steel".
It's unknown which villains they're up for, all we know is that they're supposedly in talks for one. A lot of people are saying that they could be up for the role of General Zod, who knows!