Scooby-Doo 3: Monster Mayhem

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Scooby-Doo 3: Monster Mayhem is a 2018 comedy horror film directed by Shawn Levi, written by James Gunn and released by Warner Bros. Based on the Hanna-Barbera animated television series, Scooby-Doo, it is the third installment in the Scooby-Doo live-action film series, and a sequel to 2016's Scooby-Doo 2: Monsters Unleashed. The returning cast features Thomas Sangster as Fred, Karen Gillian as Daphne, Andrew Grafield as Shaggy, Aubrey Plaza as Velma, Jesse Einsenberg as Patrick and Frank Welker as the voice of title protagonist Scooby-Doo. Series newcomers include John Malkovich, Ben Kingsley, Emma Stone, Stan Lee and Sarah Silverman who appear in supporting roles.

Plot
A year and a half after the events of Scooby-Doo 2: Monsters Unleashed, the gang returns to the Coolsville Criminology Museum for the Grand Re-Opening. When there, Scooby and Shaggy eat the whole buffet, Velma and Patrick will give a tour of the museum, and Daphne and Fred will answer some questions for the press. However, during this time there is a loud bongo drums and maracas, and then a wall bursts open, and an evil villain, who is dressed as an Chinese emperor appears, and defies the gang to an challenge, bringing with him dozens of monster-dressed goons, whom steal all the exposition.