I remember the "behind the scenes" stories from the 1968 "comeback" special.
The show's producers basically wanted the Elvis that was presented in the show that aired. They got what they wanted.
Colonel Tom, on the other hand, wanted Elvis to sing a "traditional" song like "Frosty The Showman" or "Rudolph The Red Nosed Reindeer" and smile and wink into the camera at the end and proclaim "Merruh Crizmuz Evvuhbuddy"...and he, fortunately, did NOT get what he wanted.
If you believe any of the "serious" Elvis biographers...the ones who wrote books after Presley's death that weren't intended as "payback" or hatchet jobs or cash-ins (like the excellent books by Peter Guralnick, "Last Train To Memphis: The Rise of Elvis Presley" and "Careless Love: The Unmaking of Elvis Presley"), Elvis finished out his post-comeback special career on Vegas stages, in a large part, to pay off Colonel Tom's gambling debts.
I still have to wonder what would have happened if musicians like the ones I've named...or retro kings Dave Edmunds and Nick Lowe, to addd two more to the mix...had gotten their hands on Elvis behind closed doors, with top-notch musicians.
We'll never know. In many ways, Elvis began his death spiral after two events: the death of his mother and his hitch in the Army. The "comeback special" was a minor miracle, and if he could have sustained that momentum...holy CRAP. But he just kept listening to Parker, and we can see how well that worked out for him.
