This set of albums is quite consistent with the diversity of styles included in recent bundles.based on the spines of the jewel case artwork that Foraging Rhino recently shared here, my best guess for the next Quadio batch is..
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from top L;
Bread "Baby I'm-A Want You" (Elektra),
"Graham Central Station" (Warner),
Bette Midler "The Divine Miss M." (Atlantic),
Duke Ellington "New Orleans Suite" (Atlantic)
alternative options for the Duke Ellington title depending on colour variation of the white on grey spine include;
Herbie Mann "Hold On, I'm Comin'" (Atlantic),
James Gang "Miami" (Atco)
Incredible sonics here besides a lot good music. But I'll hold of on commenting more until we get another clue, rather than count chickens.
And James Gang on Atco, I think Foraging would have said "Atco" is one of the labels if it were so. So your sense of color appears on.
Not any clues of a live album just yet. And it appears by the clues - no unissued quad mixes yet.