Rather than engage in speculation, I went ahead and actually contacted Ben Fritz at the Wall Street Journal. He specifically said that George Lucas is the reason why Disney/Lucasfilm has no plans to restore the OOT.
Is that what his knowledgeable source told him? For some reason I suspect that if he had a good source for that, it would’ve been included in the article.
I am sure he has many sources. He covers Disney for a living for one of the major news publications in the country. There should be little doubt he knows what goes on inside that company.