The following post contains info on a prequel comic that suggest major plot points in the movie.
I'm surprised no one has started a topic about this. So Walmart has an exclusive prequel comic, written by Geoff Johns, the movie's screenwriter David S Goyer and the movie's director Zack Snyder, for people who bought tickets from them for some early screening. Right here is the plot outline.
Since it is a story by the movie's writer and director we can be pretty sure it will follow closly to the plot of the movie.
Anyway, there's some pretty interesting insights for what may be elements of the movie. Kara Zor-El is the main character in the comic so she may be in the movie. Krypton has an interplanetary colonization mission so that means they have long range space vessels. The Kryptonian murderer from the beginning is sentenced to life inprisonment, so there is no phantom zone. And at the end of the comic Kara's ship crash lands on earth and sends out a signal, so maybe Superman isn't the Kryptonian Zod is looking for, but Kara.
Anyway from what it seems, this will be a very different take on Superman than anything we have ever seen before and leaves me very optimistic.