There was something dignified about the Joni Mitchell-Alberta Ballet collaboration back in 2007. She’s Canadian, ethereal, a poetic Prairie girl whose songs lend themselves to abstraction. So it’s with some reservation that we greet news the company is now joining forces with the man responsible for such pop hits as Crocodile Rock, Candle in the Wind and Tiny Dancer. What could an Elton John ballet production look like? Says the troupe’s artistic director, Jean Grand-Maitre: “I see Fellini, I see burlesque, I see Brecht.” Oh brother. “I had sex for the first time to an Elton John song … I’m not going to tell you which one.” Ok, enough already.