ok, so I've been thinking a little about krypton:
1) the story on krypton is essentially irrelevant. It explains only that this 'was' superman's home, and that it no longer exists, and that he is the last of his kind.
2)on that basis, I might not even want to see krypton. Not at the beginning of an origin atleast
3)I'd much rather see Krypton as newborn infant Kal'el saw krypton (ie. not very well). Blurry images, through the point of view of an infant that cannot understand or recognize what he's seeing. (This would last during the credit sequence) and then boom, krypton is gone, as Kal's ship escapes to earth.
4)this would result in Superman not actually knowing anything about himself, other than his human parents found him in a space ship, and that he is special.
5)Krypton would be explained in the sequel, as the origin movie would conclude with Superman finally discovering who he is, discovering the truth about krypton etc. The central question in the origin movie for superman would be: 'who am I?'
if he fights brainiac, like TAS, superman could escape with that part of brainiac wherein the Kryptonian archive is stored, and finally learn his origin, and purpose on earth