Alice In Chains had no control over the many greatest hits packages Sony/Columbia put out. There have been rumors for years of leftover Alice stuff, but the remaining members always deny it. The label will pretty much can do what it wants regardless of the band's wishes. I don't think they can do anything with the unreleased stuff, though.
Silly monkeys give them thumbs
they make a club and beat their brother down.
How they survive so misguided is a mystery.