- The Other Darrin: Kate Micucci officially replaces Mindy Cohn as Velma starting here.
- Production Posse: With Jim Krieg co-writing the movie, he's brought together many crew members from his experience on DC and other Scooby projects, including director Rick Morales, actors Grey DeLisle Griffin, James Arnold Taylor, and Dee Bradley Baker, and musical composer Robert J. Kral.
- Recycled Script: The plot is pretty much an expanded remake of the What's New, Scooby-Doo? episode "Lights! Camera! Mayhem!". Jim Krieg, who co-wrote the movie, also wrote that episode.
- Role Reprisal:
- Technically speaking, Kate Micucci is reprising the role of Velma given that she first voiced her on Be Cool, Scooby-Doo! and the "Knight Time Terror" special.
- Frank Welker, Grey DeLisle Griffin, and Matthew Lillard return to their respective roles, but Grey herself also reprises the role of Verona Dempsey from What's New, Scooby-Doo? at the beginning of the movie.
- Voices in One Room: According to James Arnold Taylor, the cast recorded together for this movie.
Trivia / Lego Scooby-Doo! Haunted Hollywood