Children's animated feature based on the classic Hanna Barbera cartoon. Ten years after meeting and forming Mystery Inc., Scooby-Doo (voice of Frank Welker) and Shaggy (Will Forte/Iain Armitage) embark on a wild adventure after they are attacked by killer robots and saved by the Blue Falcon (Mark Wahlberg). Meanwhile, Fred (Zac Efron/Pierce Gagnon), Daphne (Amanda Seyfried/Mckenna Grace) and Velma (Gina Rodriguez/Ariana Greenblatt) search for a way to help their friends and stumble upon one of Dick Dastardly (Jason Isaacs)'s evil schemes.