Here's a tantalizing glimpse of a might-have-been GATSBY: https://www.nytimes.com/2014/04/09/arts/music/unsung-carolyn-leigh-reveals-charm-of-a-gatsby-musical.html?smid=nytcore-ios-share&referringSource=articleShare&sgrp=c-cb
The Pockriss/Leigh songs are great to hear in concert, but who knows...?