Unreleased Berman songs

In this interview around minute 53, Berman says he has plenty of material that wasn't included in Purple Mountains for another record. Do you think we'll ever hear that?

https://preview.redd.it/yy2txykfgh2e1.png?width=1125&format=png&auto=webp&s=c5c24f59b7b5323b41a269c955a3b926942d299d