Over the past ten years, Johnny Cash and Rick Rubin have amassed roughly 150 recordings that have not been included on the pair's four American Recordings releases. According to Billboard, over 100 of those unused tracks are being compiled for a box set release, tentatively titled Unearthed. The collection will likely be a five-disc release, with four entire CDs of previously unreleased material. The fifth will be a "greatest hits" of sorts, pulled from Cash's four studio albums with Rubin.
Unearthed will include a number of duets and covers Cash has recorded over the years. Covers of Bob Marley's "Redemption Song" with late Clash frontman Joe Strummer (featuring guitar work from Tom Morello), Cat Stevens' "Father And Son" with Fiona Apple, and a take on an old '50s tune called "Cindy Cindy" (with Nick Cave) are all slated for inclusion.
Rubin hopes to have Unearthed in stores by Christmas. It will be released through American Recordings/Lost Highway. The pair are also currently working on Cash's next American release. "He's planning on coming [to Los Angeles] in September to take all the bits and pieces that we've worked on over the last two years and kind of flesh them out and finish them, " Rubin told Billboard. A release date has yet to be set for Cash's next studio album.