Imagine the rotating screens in the original Universe of Energy from 1982. The Imagineers using 70s and 80s technology accomplished more impressive attractions with layers of practical and digital effects.
According to
@whylightbulb, this clip shows the least impressive part of the ride. Since I've only heard more about it and haven't seen concept art, I'll take his word for it. But the cheaply, badly animated art style really is a tragic IP decision from Iger. I think everyone was hoping for Mickey across the decades.