Speaking to Mojo magazine, Jimmy Page revealed that in addition to remastering the original albums, he’s been digging into the archives for bonus material. “There are a number of Led Zeppelin projects that will come out next year,” Page explained. “… there are different versions of tracks that we have that can be added to the album[s], so there will be box sets of material that will come out, starting next year.
There will be one box set per album with extra music that will surface." Page recently oversaw production of Celebration Day, the DVD release of Led Zeppelin’s acclaimed 2007 reunion performance at London’s 02 Arena.