Led Zeppelin 1, 2 and 3 will be re-released on June 3rd.
Remastered by Jimmy Page, and each with unreleased material, these are the first releases of a reissue program that will cover all nine of the band's studio albums in chronological order. Each one will contain a disc of unreleased music related to that album.
Page says, "The material on the companion discs presents a portal to the time of the recording of Led Zeppelin. It is a selection of work in progress with rough mixes, backing tracks, alternate versions and new material recorded at the time."
The first three will be available as either single CDs, deluxe sets with the bonus disc, vinyl, digital and as a box set containing the remastered album on CD in a vinyl replica sleeve, companion audio on CD in a card wallet, the remastered album on vinyl in a sleeve replicating the first pressing, a 70-plus page book and high quality prints of the original album covers, a replica of the band's original Atlantic Records press kit and more.
The first 30,000 will be individually numbered. The bonus audio for Led Zeppelin includes a previously unreleased performance recorded on October 10th, 1969 at the Olympia Theater in Paris. The nine-song set includes a 15-minute version of "Dazed and Confused," as well as "Heartbreaker" and "Moby Dick," which would debut on Led Zeppelin II later that month.
The Led Zeppelin II bonus disc contains alternate mixes of five songs from the album, backing tracks to "Thank You" and "Living Loving Maid (She's Just A Woman)" and the previously unreleased track "La La."
Led Zeppelin III's companion disc has seven studio outtakes of songs from the album as well as three previously unheard tunes: "Jennings Farm Blues" (an instrumental forerunner of "Bron-Yr-Aur Stomp"), "Bathroom Sound" (an instrumental version of "Out on the Tiles") and a take on the blues classics "Keys to the Highway/Trouble in Mind."
Source: Led Zeppelin.com