Mass5160 said:
A simple 2.35 "crop" wouldn't look right, as for some shots, important areas would be clipped, and other shots would just look odd. It's quite uncommon for the important picture information to be directly in the middle on the IMAX scenes.
Neither "Dark Knight" film suffers visually when projected "cropped" on a scope screen. During production, the films were purposefully framed in such a way as to protect for either aspect ratio.