I'm not sure if you have listened to any of Rivers' solo albums, but they are pretty damn good. It is a compilation of his old demos. His solo albums are a lot better than the junk they are putting out now.
It is sad to see what weezer has become. It's not that they sold out or anything, (although, i think it's time they say "f*** it" and just name their next album Big Mac or something) they are just not good anymore. Pinkerton and The Blue Album are amazing. They are up there with the best beatles records for me. They are flawless. Then they release garbage like this.
No, this isn't a joke. That's their next album.