Well, according to Lucasfilm, the plot of Episode VII will be "entirely original". There's a chance that it won't ride roughshod over established continuity, and with the original actors vying to get on board, they could very easily establish it forty years later, which would give them an opportunity to introduce a new Big Three, something that EU has been struggling to build.
Also... With Disney on board, there is a very good chance that we'll get high-quality unaltered OT releases on Blu-Ray and DVD. They know that fans have been craving such releases for years, and Lucas himself had stood in the way of their releases (save for the DVD releases he had in 2002). With Lucas out of the picture, we may finally see some digitally remastered releases of the unaltered OT. That would be an early money-maker for Disney and they would be wise to go that route.