The Scooby-Doo! Shaggy's Showdown and Scooby-Doo & Batman: The Brave and the Bold DVDs both feature "Ghastly Ghost Town," "The Dynamic Scooby-Doo Affair" as bonus episodes. However, despite that the original Best of the New Scooby-Doo Movies DVD set had to edit out images of certain celebrities from the intro, both of the bonus episodes on these DVDs feature the original intro including the celebrities who have refused to allow their episodes to be released.
Additionally, "The Dynamic Scooby-Doo Affair," "The Loch Ness Mess" and "The Mystery of Haunted Island" all have the original, unedited intro on the Boomerang streaming service.
It remains uncertain if this was an error, or if WB is in negotiation with these celebrities to allow their episodes to be released on home media.
Thanks so much to Deandre for coming up with this fun fact!