John Carter Cash, son of Johnny and June Carter and owner and operator of Cash Productions, LLC and the Cash Cabin Studio in Hendersonville, Tennessee, has told the Guardian that that there is enough material left in the archives of his late father for several more posthumous albums and enough outtakes from the American Recordings sessions to fill another multi-disc box set.

Carter Cash said, There are a few things that are in the works right now – probably four or five albums if we wanted to release everything. There may be three or four albums worth of American Recordings stuff, but some of it may never see the light of day.”

Rick Rubin said: “We released the work we had been planning to release along with John [Carter Cash] and the idea of the Unearthed boxset of outtakes was his idea. We will probably put out additional Unearthed material recorded since the last Unearthed box, in keeping with John’s wishes.”

Here a John Carter Cash interview with country925fm where he discusses more releases.

The most recent posthumous Johnny Cash album is “Out Among The Stars,” featuring 12 previously unreleased recordings from sessions in 1981 and 1984, on sale now.