The film features a mix of long-time series regulars and prominent celebrity guests: Happy Halloween, Scooby-Doo! (Video 2020) - IMDb

is a 2020 animated direct-to-video film that blends the classic mystery-solving antics of Mystery Inc. with a modern, high-octane twist. Released on October 6, 2020, the movie is notable for being written, directed, and produced by Maxwell Atoms , the creator of The Grim Adventures of Billy & Mandy . Plot Summary

The gang initially captures the (Dr. Jonathan Crane), an escapee from Arkham Asylum, only to realize the "Jackal-Lantern" threat is far from over. To save the town, Mystery Inc. must team up with Elvira and celebrity guest Bill Nye the Science Guy , leading to an extended, Mad Max -inspired vehicle chase through the outskirts of the city. Notable Guest Stars and Cast

The story is set in during its annual Halloween parade, hosted by horror icon Elvira, Mistress of the Dark . The gang's celebration is cut short when a neighborhood pumpkin patch is infected by toxic waste, giving life to a swarm of flying, monstrous jack-o'-lanterns and a massive "King-sized" pumpkin leader.