Wait, what? That seems like an awful lot of work, right? Were there no backup copies of this stuff? Sure there were, but it was decided that they "just weren't the same" and that the material in general wasn't "maximum Green Day" (which at the time couldn't have meant much more than "lacking booger lyrics").
"Actually, the band was already blah blah yawn whatever," said some sad Green Day fan just now.
So, instead of trying to salvage that album, the band gave it another shot with all-new material. As luck would have it, they could probably feed their high-end-eyeliner habit for the next hundred years with the money they made from that decision.
The album that resulted from those sessions was called American Idiot, and it definitively proved that "anti-war rock opera" was a hole in the market that desperately needed to be filled, eventually selling 6 million copies.
What became of that other album, though? Did it ever surface? Interestingly, there are some Green Day conspiracy theorists who claim it has ...
That's an album called Money Money 2020 (pronounced "money money two-thousand twenty") by a band called the Network. It was released on Billie Joe Armstrong's own record label and, for a variety of reasons, many people suspect that "The Network" is actually "Green Day" and "Money Money 2020" is actually "Cigarettes and Valentines." If you give it a listen, it's hard to imagine that the two voices you're hearing aren't Billie Joe Armstrong and bassist Mike Dirnt, and the band does have a long history of releasing albums under wacky side-project names, but there's never been any confirmed connection between the two albums. Whatever Money Money 2020 may be, it's definitely not the kind of thing you write a Broadway musical over.
Glee fans, rejoice!