XSI Base has an interview with Ben Proctor, the special effects guy behind Transformers and Superman Returns. In this interview it is revealed there was an unused sequence in Superman Returns where the Man of Steel returns to Krypton:
Sadly, much of my work on Superman Returns never ended up in the final film, because at the last minute a big introductory sequence where Superman returns to the shattered remains of Krypton was dropped to help keep down the running time. But at any rate, I worked on a variety of elements for this lost sequence, including the destroyed planet itself and both the exterior and interior of a large crystalline ship which has carried Supes from earth. The interior was fully built and photographed as a translucent, glowing set which I’ve only seen in one photograph in the Art of Superman Returns book. Bryan Singer’s group has made noises about including the lost sequence in a sequel film, and I sure hope they do that so I can see how it turned out! Also cut from the release was a scene where teenage Clark Kent discovers the hidden remnants of the Kryptonian space pod which brought him to earth as an infant.
Here’s to hoping, right?