This is what The Baseline Studio System list as the official synopsis for Man Of Steel..
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.
Now I realize that this is a variation on a previous synopsis which was thought to be a fake, but Bleeding Cool vouch for this system's accuracy and have known them to be spot on in the past. According to Bleeding Cool's Brendon Connelly..
It looks to me like Warner Bros. registered some details of the film, most likely with casting services who fed it to Baseline, somehow, but have since decided to play coy. I’d be prepared to make a reasonable sized bet on the above being the film’s story.
I don’t think it’s locked, I just like the odds. A lot.
Mmmm. The West Africa thing has popped up countless times in everything from fake spoilers on IMDB, to fan guesses to APPARENTLY official leaks about the plot. It actually comes from the recent Superman comic: "Birthright" by Mark Waid. But could it actually have any bearing on the story? And if so how would Zod and the the other Krytonians fit into the story? For Connelly's full take on this click the link below.