Happy Feet Two (2011)

The weakest-reviewed film here, and worth knowing about mainly for completeness and for one inspired idea: a side story about two tiny krill, voiced by Brad Pitt and Matt Damon, who decide to leave the swarm. The main plot about Mumble's son is thinner than the first film, and critics were split. Its aftermath led to the closure of Miller's Sydney animation studio, Dr. D Studios. Watch it with young fans of the original rather than on its own merits.