since there is a really high quality soundboard bootleg out from one of the vegas shows, i dont think there is much of a chance.
How do you figure that? I mean you are right that there are some good quality bootlegs of those and other shows. But bootlegs don't make any money for the band, their label, management etc... And even tho those shows didn't have anyone from the Appetite line up except Axl, they still marked the 25th bday of Appetite. I'm suprised they didn't wanna release this last year. Would've been the 25th year and better timing.
That and like I said, movies and concert films normally have a soundtrack to accompany them. Why wouldn't this?