Bleeding Cool has a report up citing the Baseline Studio System, which featured a synopsis for Man of Steel which sounds extremely familiar:
A young reporter named Clark Kent roams the world covering various news stories. When he is compelled to use his secret powers to intervene in a crisis in West Africa, he returns to Smallville to learn more about his origins and the hero he was born to be.
That plot is almost exactly the plot for Superman: Birthright, and falls in line with previous rumors that the movie would be based on that origin story.
Also, Latino Review has some information from a source may shed some light on what to expect in the Man of Steel. It confirms that we’ll see Kal-El’s parents, that Krypton won’t be made out of crystal, and that Ursa isn’t technically in the movie:
You will see JOR-EL and his wife, Lara.
Daniel Day-Lewis was looked at for JOR-EL and not the villain.
Krypton will not be a crystal planet like the Donner film; this Krypton will PROBABLY look like the Coruscant skyline from Star Wars.
The Kryptonian villainess is not URSA…Well sort of. The villainess is FAORA.
The Krypton bit sort of fits with some of the designs of the planet featured in the comics. Faora is who Ursa was based on in the first movie, so it shouldn’t be too different.