A Scooby-Doo Christmas was the first of 2 primetime specials during the What's New Scooby-Doo era (2002-5) on Kids' WB!, but today you'd be hard pressed to find it on Cartoon Network and/or Boomerang, 15 years after its initial airing.
In a twist on a classic Halloween tale, Scooby and the gang try to unmask the Headless Snowman. James Belushi, Mark Hamill, Kathy Kinney (The Drew Carey Show), and Peter Scolari are among the guest stars.
Reportedly, CN is commissioning a new Scooby series after Be Cool, Scooby-Doo was considered a flop, but considering that 1) there was a great deal of viewer apathy over the show and 2) it was relegated to Boomerang because of network programmers' obsession with a certain superhero comedy that shan't be mentioned by name here, Be Cool was doomed right from the start.
Rating for A Scooby-Doo Christmas: A.