Yeah, that would be weird if Disney released a 4K restoration of Fantasia quietly. The guy who started this rumor was asked about it and replied:

I don’t know, one of my friends in the UK got to see a theatrical reshowing recently and told me it had Deems Tayler.

as for the release date, that’s the rumoured date that all of the 4K restorations are being added to Disney+

Whether the Disney+ rumor is true or not, if this guy is right about the Deems Taylor audio and it was actually found… then, is there any way we may be able to get our hands on it? That would quite a huge progression in the preservation of Fantasia.