Hollywood is a fickle lover—one minute, a movie is making billions, the next, it’s wiped from memory. Snow White and the Huntsman ruled dark fantasy, Finding Dory swam past a billion, and Transformers ...

With help from her friends Nemo and Marlin, Dory embarks on an epic adventure to find them. Her journey brings her to the Marine Life Institute, a conservatory that houses diverse ocean species.

It seemed like a risk for Pixar to turn comic relief character Dory from 2003’s endearing Finding Nemo into the lead character of its sequel. But Finding Dory, again directed and written by ...