Who should the JL team go up against in this film? Keeping in mind that JL needs to introduce and develop most of the superheroes in their roster to audiences first, screentime is limited. I think it would be practical and time-efficient to use Zod from "Man of Steel" as the main villain. He would be played by Michael Shannon. Zod would be accompained by Brainiac, another Kryptonian supervillain. Audiences would already be introduced to Krypton in "Man of Steel" so these would be easy villains to establish.