I cant help but to feel like Lucas began to insert things into the PT that would set up elements of the ST. If correct, The Clone Wars and Disney deal are way to recent to have been motivating factors as far the actual ideas for the ST, or intention to do one. Perhaps the Disney deal was a factor in actually getting them done. I believe that during the pre-production phase of Ep. II, Lucas got the ST itch. I say this because I expect something related to Syfo-Dias could very well come into play in the ST. The next clue to me is inserting Anakin into ROTJ for the DVD release. It seems to serve no other purpose than to hold the door open for Anakin to appear later in a form familiar to the audience, both old and new. Then moving to Ep III, the placement of Darth Plagueis seems just subtle enough to leave the door open for a Sith return after Palpatine and Vader are gone. I'm not saying Plagueis himself will be in the ST, but something related to this seems likely to me. I'm also not saying he won't be in the ST........ What I am saying is that I see these things as setting up elements of the ST that will span across both previous trilogies, which is necessary if the ST is truly a continuation of the story. If this is acturate, even partially, it would likely be because it was the only way to continue the story being as the redemption and death of Anakin Skywalker was always the intended end of the saga, be it in 9 or 12 episodes. This way, you are essentially setting up a scenario where someone is aware that the Force is out of balance, and that Anakin is to set that right. In order not to be destroyed in Anakin fullfilling the prophecy, one could be dead when it happens, but holds the key to returning after it's done.