Scooby Doo 3 - The Scariest Halloween

Scooby-Doo 3: The Scariest Halloween is a sequel to Scooby Doo: Monsters Unleashed. It is directed by James Wan and Raja Gosnell. The film stars Nick Palatas, Haley Kiyoko, Kate Melton, Robbie Amell and Frank Welker. The film also stars Benedict Cumberbatch (Star Trek: Into Darkness), Robert Downey Jr (Iron Man 3) , Ty Simpkins (Iron Man 3) , Bradley Steven Perry (Disney XD's Mighty Med) , Stephen Amell (CW's Arrow) and Elizabeth Banks (The Hunger Games: Catching Fire).

Cast

 * Nick Palatas as Shaggy Rogers
 * Haley Kiyoko as Velma Dinkley
 * Kate Melton as Daphne Blake
 * Robbie Amell as Fred Jones
 * Frank Welker as Scooby-Doo (Voice)
 * Ty Simpkins as Peter Rogers Shaggy's brother and Mystery Inc's tech wizard
 * Bradley Steven Perry as Bruce Grayson Jack Grayson's son and Mystery Inc's scientist

​Suspects

 * Robert Downey Jr as James Cedrick III
 * Elizabeth Banks as Samantha Hunt
 * Stephen Amell as Jack Grayson
 * Matt Damon as Jacob Phillips

​Culprits

 * Benedict Cumberbatch as William Jones He wanted to revenge on Jacob Phillips, who stole a sacred artifact 5 years ago called the Cosmic Sphere. In the end, he was blasted with a particle accelerator, making Jones go through a deadly black hole.
 * Guy Pearce as Dr James Hardy The man who found the Cosmic Sphere. He also helped William in the revenge against Jacob. In the end, he revealed that he was the true Halloween Wizard and Velma, who got injected with Hardy's formula, Chemical SXZK, throws a missile at him and blasts it with Hardy's ray guy, making him explode.
 * Ben Kinglsey as Bryce Slattery & The Halloween Wizard A actor who portrayed the Halloween Wizard. In the end, he was arrested.

Clues

 * Video Camera
 * Script for The Halloween Wizard's lines
 * Cupboard full of SXZK
 * Props for the Halloween Wizard

Plot
TBA