Director Rob Reiner has confirmed that a sequel to 1984’s “This is Spinal Tap” will begin shooting next year. Returning as members of everyone’s favorite pathetic heavy metal band are stars Michael McKean, Christopher Guest and Harry Shearer, with appearances by Paul McCartney, Elton John and Garth Brooks. (Will they call it “Spinal Tap 2”, or “Spinal Tap 11”?)