however, frank bello returned to the band as well as joey belladonna and dan spitz in 2005, when anthrax announced a reunion tour. this successful tour ended in 2007, and joey and dan left once again. new singer dan nelson was announced and rob caggiano returned. they started making a new album called "worship music", which was supposed to be released in 2009. however, dan nelson left the band during that year, and the album was put on hold. john bush made a return to the band, who considered releasing "worship music" with this singer.