A big hurdle (maybe the biggest) for anyone making a new "Superman" movie is that unlike other comic-heroes you've got a general-public that has JUST as strong an impression of what the character "must be" as the fans do - except said impressions are entirely different. Superman is the most iconic fictional figure on the planet Earth, everyone who knows him also "knows" what he's supposed to be... and for the mainstream audience, the "supposed to be" framework is largely limited to the everybody-knows origin story and the various movies and TV shows; with ONE simple question hobbling even the most earnest of attempts: How do you "refresh" Superman for today without simply revisiting "Superman: The Movie?"
According to Latino Review, Zack Snyder (director), David Goyer (writer) and Christopher Nolan (human fanboy-proof-shield) have apparently found the answer: By revisiting "Superman II," instead.
Earlier today, word "leaked" that the new "Superman" movie was casting a major female part... but that it wasn't Lois Lane. In fact, the "shortlist" seemed to be favoring blondes. "Who could this be!?," wondered The Internets. Lana Lang? Cat Grant? Supergirl!?
Sez Latino Review: It's actually URSA, the female member of the troupe of Kryptonian ex-cons led by General Zod in "Superman II."
This makes a lot of sense, really. Zod etc. are really the only Superman enemies other than Lex Luthor and MAYBE Brainiac that non-comic readers have heard of, so it's familiar for "everyone else" while fans can likely look forward to the "Superman fighting someone/something else with super-powers" movie they've been demanding since before "Returns." The obvious question now becomes "so is Zod in there, too?" Probably, yeah... if for no other reason that I can't imagine them having the ONLY combat in the film being Superman punching the crap out of a woman, super-powered or not. The still-secret storyline supposedly involves a younger (20-ish) Clark Kent traveling the world (in-between leaving Smallville but before settling in Metropolis) trying to decide exactly what form his "use powers to help world" form will take; so make of that what you will. "Clark doubts powers can actually be helpful, same-powered heavy threatens world, Clark realizes purpose and becomes Superman," maybe?
Actually, Zod could be the "teased for the sequel" bad guy, too... or would that be Luthor?