In a recent interview with BBC Radio, Paul indicated that he is hoping to soon (or not in the terribly distant future, anyway) release "Carnival of Light," The Beatles' "mythical" 14-minute avant-garde freakout that arose from their "Penny Lane" sessions and made its only public appearance at an offbeat music festival, in early 1967, called "The Carnival of Light Rave."
Some, however, are questioning the wisdom of its potential release, perhaps in too strong of terms, I might add.
I look upon "Carnival of Light" as a simple curiosity, but I'm also not anticipating any sort of revelatory and triumphant composition. For a non-self interested perspective (in contrast to Paul's), consider George Martin's description of the piece as "ridiculous." I, for one, would be more than comfortable standing with Sir George if my opinion matched his. In all that I've seen and read of him, he comes off as sensible as he does stately.
Possible counsel to consider in this matter: beware of myth-making.