If they can still run Gone With the Wind on a regular basis, I don't understand why they can't release Song of the South.
If they had Leonard Maltin do an extras featurette with some leading African Americans discussing the negatives of the film, I think it would make a difference. It's all in the way Disney handles this. If they just release it as an exercise to bring in more $$ and nothing more, than it would be a disaster.
There are plenty of other films that also do not fairly depict African Americans and yet they are still shown without the same alarm accorded to SotS.
I have a bootleg copy of SotS with Japanese subtitles so I am able to see it.