'Happy Feet 2' will leave you entertained but unfulfilled

In the 2006 animated blockbuster 'Happy Feet', an alienated emperor penguin named Mumbles found empowerment through tap-dancing, and in so doing managed to both attract a mate and stop the overfishing that imperiled his Antarctic habitat.

Directed by George Mitchell – the same George Mitchell who gave us the post-apocalyptic Mad Max trilogy and the almost despairingly bleak 'Babe: Pig in the City' – 'Happy Feet' paired its broadly conventional narrative with a darker sensibility not often seen in talking-animal fare.