Harry Shearer, Christopher Guest, Michael McKean and Rob Reiner, the four co-creators of the band at the center of the 1984 “mockumentary” film “This is Spinal Tap,” have filed amendments to their ongoing lawsuit filed against Vivendi’s Universal Music Group and Studiocanal for alleged underpayment of music royalties in the film, including adding UMG as a defendant and seeking the right to reclaim their copyrights to the film, its songs and characters.
