And yes, I think it can be done. Maybe not exactly, but we can get a 'best-guess' version, which I think would be well worth the effort.

As far as I can recall, there are only two scenes that would need to be re-comped, but it shouldn't be a problem for an Darth Editous or an Adywan. The Emperor hologram scene and the weather vane need a little work.

The rebel fleet at the end needs a little trimming.

So as far as I can tell, the bulk of the work is coming up with a good theatrical version to start with (ie., non-Special Edition) and adjusting the audio.

I would sell a kidney to see a project like this completed.