It looks like there are some 1080p up-scales on youtube.
There doesn’t seem to be much info on this. (What is it’s source? Is it an up-rez project? Is it a new scan?)
Just finished a DL to watch it in HD. Definitely an up-rez (lots of jaggies). Stepping through the frames, it shows a 1-2-3-3 [frame] cadence (on zoom shots, so animation-holds won’t be misinterpreted). It shouldn’t have any, as it is a 24fps video (from YouTube). A closer look reveals frame “3” is repeated, in place of frame “4”, which is dropped! Very bad. Color-wise, it has the same technicolor primaries-saturated look of the “Max Fleischer’s Superman 1941-1942”, Warner Bros., 2008, of the Original Post. The other DVD sets have non-primary-saturated and weak color. Finally, it is uniformly widescreen-stretched, but not all the way to 16:9, hence the remaining area is pillar-boxed.