Warner Bros. has released the very first official trailer for Scoob!, the upcoming American computer-animated adventure comedy film, which features how the Scooby-Doo and long-time best friend Shaggy Rogers.

The trailer, which shows some of the characters in their teens and their younger years, starts with young Shaggy meeting a homeless young pup at the beach. When an offers arrives to take Scooby, Shaggy claims The Great Dane. “He’s not a stray!,” Shaggy said, then naming him “Scooby Dooby Doo” to prove it.

Frank Welker is voicing Scooby-Doo, which he has done so since 2002, while Will Forte is Shaggy. Tony Cervone directed the film, from a screenplay by Kelly Fremon Craig.

Also in “Scoob!” are Zac Efron as Fred Jones, Gina Rodriguez as Velma, Amanda Seyfried as Daphne and Jason Isaacs as Dick Dastardly.

Scoob! is set to for release next summer on May 15, 2020.

Here’s the film’s official synopsis:
The first full-length animated Scooby-Doo adventure for the big screen is the never-before told stories of Scooby-Doo’s origins and the greatest mystery in the career of Mystery Inc. “SCOOB!” reveals how lifelong friends Scooby and Shaggy first met and how they joined with young detectives Fred, Velma and Daphne to form the famous Mystery Inc. Now, with hundreds of cases solved and adventures shared, Scooby and the gang face their biggest, most challenging mystery ever: a plot to unleash the ghost dog Cerberus upon the world. As they race to stop this global “dogpocalypse,” the gang discovers that Scooby has a secret legacy and an epic destiny greater than anyone imagined.