In 1985, the murder of a government-sponsored superhero draws his outlawed colleagues out of retirement and into a mystery that threatens to upend their personal lives and the world itself.

In 1985, the murder of a government-sponsored superhero draws his outlawed colleagues out of retirement and into a mystery that threatens to upend their personal lives and the world itself.

After going their separate ways, Scooby-Doo, Shaggy, Velma, Daphne, and Fred reunite to investigate the ghost of Moonscar the pirate on a haunted bayou island, but it turns out the…