It has been announced that it will be rethemed with The Princess and the Frog. A good replacement, given that it's a most recent film in comparison to Song of the South.
And what will happen it if gets cancelled after the people who oppose it and outnumber the ones want change backlash and say no? Sometimes companies cancel or postpone things when a backlash comes, just like they did to Warner Brothers about Tom & Jerry Golden Collection when they were about to deliberately release it without two of the cartoons, including "Mouse Cleaning". And with that, they postponed the release, clearly not wanting more backlash and been proven that the customers are against this PC nonsense. Sorry to point these out.