Although only three "Immersion" Pink Floyd sets have been planned, drummer Nick Mason thinks there's still one more that the band needs to put some effort into. In 2011 and 2012, the band released massive multimedia reissues of their three biggest albums -- 1973's The Dark Side Of The Moon, 1975's Wish You Were Here, and 1979's The Wall.

Although the series was slated to wrap after the three Floyd masterpieces were released, Mason is eying at least one more opportunity to raid the band's legendary vaults, telling Record Collector, "The one I really want to do is the early years. I don't think we can do any of the other albums in the same depth as the three major ones. There are various packages that might be interesting. One is the early years. Take a couple of the early records: Piper (At The Gates Of Dawn), (A) Saucer (Full Of Secrets), Meddle. . . I'm not sure how Ummagumma or Atom Heart Mother would work; well, they'd work, but in terms of our development, those would be the obvious one."