Kal-El is not the only member of his family to escape the destruction of Krypton.
I am still convinced that both Jor-El and Lara die - just not together. I see a scenario where Jor-El sacrifices himself to save his wife and child, who fly off in a ship. They escape to Earth, where the damaged ship is at risk. There, Lara sacrifices herself to save her son, who is sent off in a emergency pod, whilst the ship crashes in the North. When Clark gets older, he finds the ship, which recognises who he is, informing him of his past.
Almost every part of this change improves the story. We get an explanation for why Jor-El didn't try to save his whole family - now he does. We get a clear reason why the ship comes to Earth - Lara piloted it there. We get an scientific explanation for the 'Fortress' instead of magic crystals.
All that's lost is a bit of the whimsy, and idea that a child is sent out at random, although the outcome is the same.
Lots of evidence to support this. In the trailers, the 'fortress' looks more like a ship, down to the flares, floors.
The shot of a woman watching the destruction (Krypton?). It could be from a cave - OR a view screen from a ship?
Finally, John Byrne was set to use a similar idea for his origin, called (surprise, surprise) Man of Steel. Lara was to come with Kal-El to Earth and the Kents, and die shortly after by Kryptonite poisoning...