Hm no. Tenacious D were a TV series on HBO to begin with. Supported by rock celebrities within the industry, turned into a movie and then pushed out on the road during which they performed as the two main characters of the movie. Not unlike Glee, a TV series also pushed by the industy, that turned into a concert tour where members of the original cast perfomed in character of the show. https://en.wikipedia.org/wiki/Glee_Live!_In_Concert!