this already is the "rarities tour." That's why people on this board are so excited that the Stones busted out the "rare gems" Respectable and Let's Spend the Night Together in Boston. Not to mention the almost "lost deep album cut" Happy!
I suppose it would be cool if they added "Let It Rock" to the set. Like it was said a week or so ago, Keith could play songs like LIR in his dreams. It shouln't take long to rehearse it.