'Kung Fu Panda 4' review: Jack Black's butt-kicking franchise embraces change

Kung Fu Panda 4 is all about change. Franchise hero Po (voiced by Jack Black) struggles to accept that he may not be the legendary Dragon Warrior forever, faced with handing over the prodigal title, and knowing that he'll soon have to take on other responsibilities. Meanwhile, the film presents us with the literal embodiment of change in new villain the Chameleon (Viola Davis), a shapeshifting sorceress on a quest for world domination.SEE ALSO:Po faces a shapeshifting new villain in 'Kung Fu Pan