I actually think the film WAS pretty much finished when it was taken away from Williams - I restored the film 6 years ago and the Miramax and Calvert cuts show signs that it was essentially complete.
However, that doesn't help us as I don't have access to the scenes they cut out. Neither do they, apparently - it's said that much of it is lost, though I suspect that Williams somehow managed to keep it all anyway.
So yes, there will be a few scenes that appear in bootleg quality, and scenes that appear as storyboards and pencil tests.
The real surprise will be how much of the film is actually finished, though. Nearly all of it is.
I will have to use a few shots that were finished by other, less talented animators, but that's the way it goes. Many of them are from the animators' original pencil drawings, so it works fairly well.