Christopher Guest’s next mockumentary focus: retro collectors: “Christopher Guest and his Spinal Tap brothers Harry Shearer and Michael McKean (who have been touring together recently) want to bring the world of collecting to the big screen. We’re not talking only about the regular ‘collector’s item’ sort of fare, but ‘people who ferret out such things as old comic books, Barbie dolls, vintage magazine ads, vinyl 45-rpm singles, or even – ick! – Charles Manson song lyrics written on Kleenex.’â€