Doctor M said:
Disney still has unaltered/unrestored film scans somewhere of their oldest films that may yet get a proper restoration. I fear the newer films that were modified for IMAX have had their digital data altered and might not be able to be restored to their theatrical version.
Even if the CAPS files were altered, original 35mm film-out elements of the post-TLM films must still exist in the vault. (And keep in mind, truly theatrically-accurate versions of those films would have to come from film, not digital files. Sure, they wouldn't look crystal-clear perfect like Disney seems to want everything to appear these days, but hey, they never looked like that in the first place!)
I know it will almost certainly never happen, but it would be neat to see "original theatrical versions" of at least BATB, Aladdin and TLK, scanned from the 90s film elements (and not de-grained!)