One of the reasons I think we'll see an OOT restoration eventually is because it's relatively simple compared to some film restorations that were much more difficult, not to mention we are talking about Star Wars here, Disney isn't against preserving classics like Lucas was and there is a DEFINITE market for the non-SE's. With a price tag of approximately 1 million US dollars there's no way to not make a significant amount of money. I'm not saying they'll make back their 4 billion from this but it'll still make for good blu ray sales