8) General Sam Lane
Firstly, General Sam Lane is a familiar character to TV audiences – after having recurring roles on Smallville and Supergirl – but he has never appeared in the movies. A no-nonsense military man who hates Superman, the interesting twist is that he’s the father of Lois Lane. Though Superman interacting with his practical father-in-law would be interesting, Lane turning up would also hopefully mean that Amy Adams would get more to do as Lois.
General Lane is perhaps somewhat like Amanda Waller – someone who’s so obsessed with ensuring the protection of the people to the extent that they often crossover into making the wrong decisions. For instance, Lane’s distrust of Supes often leads him to ally himself with Lex Luthor.
The character might not be a big enough threat to carry the main villain role, but he could be a strong secondary antagonist in the movie.