
You and everyone else on this forum.
My theory is this, that they have these unreleased items but do not have the confidence that they (on their own) are commercially viable.
But they won't let other people have access to, or release anything they have copyright over, because god forbid that someone somewhere should make $0.50 without them getting a sizeable cut
For instance, look at the promo vids owned by Arista.
They must have about 4/5 (off the top of my head) really rare promo vids.
Not enough for a DVD, but if they were put on a Hits Out Of Hell with the rest of the vids the fans would flock to buy it.
But Epic wouldn't want to pay too much for the rights because they have no faith, and Arista don't want to let them go cheap because they don't want to miss out on cashing in on 25 year old vids that are gathering dust in a store room.
So it's the fans that miss out.