It's the more wackier thing Green Day have done. There's lots of speculation that The Network's album, Money Money 2020 is actually the stolen album that was supposed to be out in place of American Idiot. That album was called Cigarettes and Valentines. The band still has rough recordings of that record but the master tapes were said to be stolen. Some speculate that the theft of the master tapes was a cover story. They think that their label, Reprise rejected Cigarettes and Valentines so they put it out as the Network on Billie Joe's label Adeline.
Personally, I think Money Money 2020 and Cigarettes and Valentines are not one in the same. If I recall correctly, the band said that Cigarettes and Valentines was more along the lines of their 2000 album, Warning.