A number of significant scenes ended up on the cutting room floor such as the Return to Krypton sequence, scenes with Ben Hubbard and Martha Kent, Kal Penn's character's dialogue was cut, an opening sequence with comic book opening similar to Superman: The Movie's opening, Clark adjusting back to life on earth, young Clark growing up, and lots of dialogue and extended scenes that supposedly added to the film and gave it better pacing and beats." For more information, go to the official site for the campaign,
HERE. Check out the trailer they've put together:
Superman Returns: The Bryan Singer Cut from srtbsc on Vimeo.