According to Worst Previews, while General Zod still remains the main villain it is being rumored that Bradley Cooper has been cast as Luthor for a quick cameo.Ãƒâ€šÃ‚Â
WARNING: HERE BE SPOILERS, EVEN IF THEY’RE ONLY RUMORS!
CBN is reporting that in first draft of the script, Luthor is the one who forces the Kryptonians (Jor-El, Zod, Faora) through a Phantom Zone portal using Kryptonite. He considers forcing Superman through as well, but soon decides against it.
Again, remember that this is just a rumor for now, as director Zach Snyder has said several times that he wants the movie to go in a different direction and Luthor is more of the same.