Can't do anything with the Donner Cut without spending some money since it was finished at 1080. Also Superman Returns was shot in 1080 using Panavision Genesis HDs and finished at 2k resolution so there's no way around an upscale with it.
Per the Bits...
"First, Warner Bros. Home Entertainment has just officially announced the long-expected 4K Ultra HD release of Richard Donner’s original Superman: The Movie on 11/6. The 4K release will include the theatrical version of the film only on 4K and on the newly-remastered Blu-ray...
Eh, I like the bits where Supes survives Luthor's gauntlet and Dick Donner's cameo as the grumpy guy in front of the JVC tv display.
Also the extended version has that great audio commentary with Donner and Mankiewicz. Never could get through the Salkind/Spengler one. Such a bore.
The six-track was predominently a 4.1 (the ".2" was just a duplicated LFE due to the absence of dedicated subwoofers at the time) with some scenes mixed in full 5.1 as a test. However none of the theaters that had 70mm prints booked played it with the split surrounds decoded. I'm assuming the...
I'm sure RAH can chime in on this, but I'm pretty sure I read somewhere here or another site that the 2000 restoration was purely photochemical and all they'd have to do is scan the extra 8 minutes.
And please stop talking about picture resolution when the film itself is buried in filters.
As far as I am aware the only Dolby Stereo film to have a dedicated mono mix was Star Wars. The necessity for a separate optical mono was negated when it was discovered that Dolby 2.0 could be reproduced in mono quite easily.
They went 20M overbudget actually (no thanks to Marlon Brando and having to restart production in England when the pound cratered). Which meant Warners had to get involved and nullifying the terms of the initial negative pickup deal (WB got tv rights to the first film out of it).
Both cuts of Superman were remastered using the AVC codec for the Anthology box. The improvement was at best modest.
Since I've never purchased the TV cut, I'm not sure if it looks better than the 2011 discs. Most of the reviews online suggest it actually does not.
Also the whole point of HDR providing darker blacks and truer whites is kinda moot when the film has very milky darks and intentionally blown out whites (especially on Krypton).
CapedWonder isn't what I'd call an official source which is why I raised an eyebrow the other day when I saw their tweet on the matter. Still shows how far Bill has slid into irrelevancy if he has to crib from a lower rung.
I think what he means is basically these older films are really just glorified upscales because the elements were produced in a way that does not hold up to such extreme scrutiny.
HDR is probably the only thing you could add that would be moderately perceptible. As it stands, there's probably about 1.8k worth of information there.
As I have said multiple times, you really need to check your expectations at the door for this title since the fog and diffusion filters are going to knock the overall resolution down a few notches.