The Pierre Boulez Centennial is coming up next year (2025), with big programs planned at Carnegie Hall and Lincoln Center. I'd be surprised if we didn't see new or reissued box sets from Sony and/or Deutsche Grammophon. A good opportunity for Dutton here, too. We've already got Boulez conducts Bartok, Stravinsky, Ravel, Wagner...maybe Mike could round out the series with Varèse?
https://www.discogs.com/release/1192863-Varèse-New-York-Philharmonic-Boulez-Boulez-Conducts-Varèse-Amériques-Arcana-Ionisation
Or perhaps there's an unissued quad recording of Schoenberg's Moses & Aaron?
https://www.discogs.com/release/3143147-Pierre-Boulez-Conducts-Schoenberg-Moses-And-Aaron
These wouldn't be big sellers, but as several people here have noted, Varèse in particular was an influence on several 70s pop & rock stars, from Zappa to Chicago's Robert Lamm, in addition to being a major figure in the history of electronic music.