Michael McKean, Harry Shearer and Christopher Guest play aging rock stars in the mockumentary Spinal Tap II: The End Continues. (Bleecker Street)In 1984, the groundbreaking mockumentary This Is Spinal Tap lampooned heavy metal bands and rock documentaries — and introduced audiences to a new film genre. Spinal Tap, the fictional band at the center of the film, was known for its excesses both on- and off-screen. Now, in the sequel Spinal Tap II: The End Continues, the band returns for a reunion concert. Rob Reiner, Christopher Guest And Michael McKean Join ‘Spinal Tap’ Lawsuit The three comedy legends join Harry Shearer’s lawsuit, first filed last fall, against the film’s owner.