Superman: Man of Steel Plot Speculation
One bit at the end, when Richard convinces Lois to go visit Superman at the hospital, contains an especially tantalizing bit of exposition: Lex's shake-and-bake continent is "settling into an orbit between Mars & Jupiter, still growing." Apparently, "they're calling it Planet 10," but Perry wants a better name. Lois tells him to call it "New Krypton."
There's no way New Krypton doesn't figure signficantly in the next one (which has a working title, Superman: Man of Steel).
Another interesting tidbit, and one which perhaps points the way forward: the original opening is not among the deleted scenes. This is an expensive--and finished--FX-heavy sequence detailing Kal-El's short return to examine the ruins of Krypton.
That it's not in the deleted scenes pretty much guarantees they're intending to use this sequence in Man of Steel (possibly as the opening).
I assume they're gonna want to alter the sequence to make it relevant to Man of Steel's plot, possibly to help launch the plot. If so, there's really only one way to go: Brainiac, the intergalactic scourge who goes around miniaturizing and stealing alien cities for, ah, study. Yes, Superman has other space based adversaries, but Brainiac is the classic. (Anybody who says Doomsday right now gets smacked.)
So instead of just random Kryptonian ruins, Superman also discovers a Borg-like scene on Krypton ... as though someone scooped a whole city right ouf the ground. The city of Kandor, we would later find out, Krypton's capital.
He has no idea he's being watched, and with kryptonite radiation levels reaching critical, no time to examine the ruins, so he beats a hasty retreat. And Brainiac follows him all the way back to earth, where he decides to add Metropolis to his menagerie. Luthor gets involved, naturally.
And maybe they make their base on New Krypton--where Superman can't get at them.
In the comics, though Brainiac escapes, Superman is able to rescue Kandor and install it in the Fortress. But he's unable to reverse the miniaturization--it remains a city in a bottle--which would be a cool, sad, ending: he saves the last Kryptonian city but he can never go there (again, that is, 'cause he'd probably end up there during Act 2 of the film), and they can never come out. So he's still alone in the universe.
...Unless they give into the temptation to retcon Supergirl into a Kandorian. (She technically came from Argo City, but wouldn't the Kandor plot be more interesting if Kal-El has *family* in that bottled city?)
Anyway, that's what I'm hoping to see as a basic plot for Man of Steel.