Scooby-Doo 3: Creatures of the Night (2013 film)

Celebrating the ??? anniversary of the day they were created, Scooby tries to unlock his past, when he has weird dreams. And they have to solve another mystery to figure out what is happening when the ???, the one in Scooby's dreams

Premieres
March 22, 2013

Characters

 * Scooby-Doo (Neil Fanning) - has been suffering dreams
 * Shaggy Rogers (Matthew Lillard)
 * Fred Jones (Freddie Prinze, Jr.) - proposed to Daphne, but is worried, that he has kids, they might inherit his old brown hair, revealing that he dyed his hair blonde to make him look like a blond
 * Daphne Blake (Sarah Michelle Gellar) - proposed to Fred, comforts Fred that everything is going to be alright
 * Velma Dinkley (Lucy Liu)
 * ??? (Sylvester Stallone) - the man who is made a suspect, believing that he may be the one who made Scooby lose his childhood, but he was actually an FBI agent, he arrested Deedle for ???

Suspects
???

Clues

 * A picture of Scooby's family in ???'s office

Culprits

 * ??? Deedle (Crispin Glover) - Reason: to get revenge on Mystery Inc. for thwarting his plan to steal the Coolsville Academy time capsule, Goal: he made an alliance with ???
 * ??? (???) - Reason: ???, he was the villain from Scooby's past and dream, he was ???

Plot
???

Trivia

 * Lucy Liu replaces Linda Cardellini, due to the fact that Velma was asian in The Mystery Begins and Curse of the Lake Monster.