There is no telling what is in the vaults or not. There could be tapes that could last for several years.
Is there any music that we have not heard yet that is still in the vaults?
"When I was a child, ladies and gentlemen, I was a dreamer. I read comic books, and I was a hero in the movie. So every dream that I ever dreamed has come true a hundred times. I learned very early in life that without a song, the day would never end; without a song, a man ain't got a friend; without a song, the road would never bend; without a song. So I keep singing a song." - Elvis Presley
There is no telling what is in the vaults or not. There could be tapes that could last for several years.
I sincerely hope there are more left in the vault to be released. I can only speculate there are some left but the authority concern is taking time to release them following a set of timetable for business purposes I believe.