Coco
The biggest twist in Coco comes when Miguel (Anthony Gonzalez) discovers that Ernesto de la Cruz (Benjamin Bratt), a great musician whom the boy idolizes and believes might be related to him, is revealed to be a villainous murderer. De la Cruz poisoned the original owner of his guitar, Miguel's real great-great-grandfather Héctor (Gael Garcia Bernal), in order to steal his instrument and songs, which allowed him to achieve fame and notoriety.
Everything, Everything
It was heartbreaking to watch Maddy (Amandla Stenberg) stuck inside her hermetically-sealed environment due to her alleged illness. Even worse, she didn't need to be! Maddy's mother, Dr. Whittier (Anika Noni Rose) had been lying to her the whole time—she was never diagnosed with a severe immunodeficiency disorder and could have been with Olly all along. Fortunately, the two end up together.