Fun fact, Weezer's second album was almost this

During 1994-96, the American pop rock band recorded an album's worth of new material titled Songs from the Black Hole, which was going to be a rock opera but most of the material was discarded in spring 1996 and recorded a new album out of scratch, which was Pinkerton with five songs from the scrapped album being reworked into the Madame Butterfly inspired album whether it was on the album itself or as B-sides, though some of the songs (albeit in demo form) would later appear in frontman Rivers Cuomo's Alone compilation series.