I've also seen photos of the "supposed" set list from Indianapolis that Rick mentioned....and as Rick said, it is questionable whether the list is in fact genuine. That would have been VERY cool if he had performed it though!! It would be VERY interesting to see how well it would have sounded live, although I am sure it would have been AWESOME!!!
There are reports from various sources (including Charlie Hodge, if you can believe what he has to say) that Elvis was considering performing WAY DOWN on the tour that was supposed to start in Portland, ME. on 8/16. As I said, whether we can believe Charlie or not is yet another question, as he has a tendency to embellish things, shall we say!