I think there are many reasons it probably won't happen. One is that I don't think the Stones like competing with their younger selves, either for the good or bad. They are still touring, after all, and releasing new DVD's of those shows. There's also the fact that Allen Klein and ABKCO controls their early catalog, and the music rights for that period would have to be coordinated by the Klein family. So, you have two different organizations controlling the music rights -- the Kleins for the early years, the Stones themselves for the later ones. The Klein family did make the release of "Rock and Roll Circus" happen, so the ball might be in their court for the pre-'70s TV and concert appearances.
I think there are too many controversies in the band's past for them to want to do a comprehensive "Anthology" type of collection. They also don't have any old friends on their payroll that might want to make it happen, as Neil Aspinall did for the Beatles in getting the ball rolling for the Anthology project. There is a ton of stuff in the Stones archives, including official movies such as "Ladies and Gentlemen, the Rolling Stones" and "Let's Spend the Night Together." But even those aren't being reissued, so I don't see them going into the TV archives to get that material released.