I wouldn't mind that either. The 5.1 mix that exists today uses new sounds effect, however, so the only way to get the original sound is with the 2 channel track.
No details on the audio for 1978's Superman listed yet. I trust we will get the original 2 channel surround sound option in lossless and not just the 5.1 remix. The remix is fine for the 2001 cut of the film. :)