Spending weeks at the top of the US box office charts, defying even its own company’s high expectations. Overtaking The Lion King to become the highest-grossing Disney film in the States. And sending its soundtrack album roaring to the head of several music listings. No surprise, then, that the Mouse House is seriously looking at turning Frozen into a musical. Given how the company likes to spin-off its movies, this was probably a given from the opening weekend, but, talking to Forbes magazine, CEO Bob Iger has said they’re in deep discussions about the idea, though he says, "We're not demanding speed. We're demanding excellence." Frozen , even more so than, say, Tangled , has Broadway in its bones thanks to the lyrical (and story) contributions from composing couple Robert and Kristen Anderson-Lopez, who have between them contributed to various hit musicals including Avenue Q and The Book Of Mormon. While Frozen’s technical challenges might be considerable g