A long term fan of Scooby-Doo, Tim Curry considers "Dreadful darkness, hear my cry. Bring back one who cannot die" to be his favorite line through his career as he believes this was an inside joke referring to Scooby-Doo (who entered the scene after the line was said).
Billy West did not reprise his role as Shaggy from the previous film Scooby-Doo on Zombie Island (1998). Reason being, West needed time for his roles as Philip J. Fry, Professor Farnsworth and Dr. John Zoidberg on Futurama (1999), so director Jim Stenstrum was thinking of replacing West with Rob Paulsen, Jeff Bennett, Tom Kenny and Dee Bradley Baker, but they all lost to Scott Innes.
Ben Ravencroft's home town is Oakhaven, Massachusetts which is a fictional town. The building of the Puritan Village would surmise it's a substitute for Sturbridge or Plymouth. Witches would surmise it's Salem or Danvers. None of the people in the town speak with a Boston-area accent. Ben speaks with a light British accent and the Mayor speaks with a very distinct Maine accent.