Since general Zod is the only nemesis truly worthy of Superman ...
Take that, Brainiac, Doomsday, Darkseid, Manchester Black, Bizarro, Eradicator, Gog, Cyborg Superman, Imperiex, Jax-Ur, Mongul, Atomic Skull, Parasite, Metallo and Mr. Mxyzptlk.
Yeah, it will be nice to see a villain who is Superman's equal for a change. The only real fight we've had in the films up to this point has been Superman vs. Nuclear Man. And The Quest for Peace getting any credit is just wrong.
So, you haven't seen Superman II