skyjedi2005 said:

I understand but was not that the original aim of the special edition to just fix a couple of bad shots. Clean up the soundtrack and picture.

They when Lucas got Fox to pay for the whole thing he used it as an excuse to play with his computers as free r&d for the prequels.

Ruining 3 classic films in the process and then deciding the other version had to quietly disappear.

Does Disney ever release a catalog title unaltered?

Well, in this case there's a lot more demand for it to be unaltered, so yes I believe they would. Also, remember that Lucasfilm is still an entity, it's just owned by Disney now, so the people that slightly alter and release old Disney movies aren't going to be in charge of restoring Star Wars, and even if they are they won't alter it if Lucasfilm says they want to release it unaltered. If these 4K rumors are true, then it would be RMW that's restoring the films too, not Disney, so I don't think we have to worry about that.