Just Blaze's personal library of unreleased music has to be legit crazy. Last night, he gave a small preview of said library, which included an alternate ending for Kanye West's "Touch the Sky" with Robert Glasper and a version of "I Really Mean It" with all of Dipset. Unfortunately, Just deleted all of his Instagram previews from last night, but he did keep up a preview of a Black Album era demo from Jay Z and Pharrell. It sounds like the preview is of a demo of Jay's song "Early This Morning." While Just said that the previews were for the "Night owls" only, he teased that a few of the tracks might end up somewhere soon. We can only hope.