SUPERMAN: THE MOVIE now includes both the original 6-track audio AND the original 2.0 audio in lossless DTS-HD MA (in addition to the Atmos mix)—the Christopher Reeve credit in the film also no longer has the weird video glitch.
2. SUPERMAN II includes an improved Atmos mix that corrects the various “wow” and pitch issues on the previous 4K disc.
3. SUPERMAN II: THE RICHARD DONNER CUT features a video fix to the geometry of the iconic final shot of the film, in which Superman smiles at the camera—the shot on the previous 4K disc was oddly squished horizontally.
4. SUPERMAN IV: THE QUEST FOR PEACE includes an improved Atmos mix that corrects the inadvertent use of various alternate (and incorrect) musical performance cues.
NOTE: The SUPERMAN III disc in this set is unchanged from the previous 4K release.