So Neville if anyone remembers him?
Iunno, as a massive Scooby fan, i'd have to disagree. Anyone that's worked retail knows you can talk about any random subject at any given time, and as such i've talked with several customers about Scooby. And any time i've ratted off a name or description of ANY villains in the seasons and shows leading up to the films, nobody has known who im talking about until i rat off where they are or what part they play in the 2nd film. Even in the Cosplay community, when i say i'm working on a Captain Cutler outfit nobody has any clue who that is until i tell them "Hes the guy in the lake in the 2nd film when they go to the clubhouse". How many members here had no idea who that was until that description? If the niche-ish market based on outdated pop culture doesn't know who that is, why would the GP know any of them? Not to mention, would you rather the ride look like it used to, or like one of the piss poor Sally Scooby shooting rides? While i may be a little biased considering the first one is my 2nd favourite live action movie behind Bootmen, the films are still relevant and remembered by many. Even the guy in the gift shop at the end seems to love it, instantly picking up on my Spooky Island shirt and then throwing facts at me (all of which i already knew). Also, the first film while lacking many of the gags of the original series' it gave us depth to the characters. Something apart from Scooby and Scrappy we hadn't seen until What's New Scooby Doo and very much the even more recent, Mystery Incorporated. It was when they added in the gags in the 2nd one where the film fell short.
Also, you're suggesting a retheme of a ride based on a ghost train in a tropical themepark to a 48 year old TV show that unless you grew up on the show or are as much of a fan of it as i am, no one remembers. Let that thought sink in. If you're suggesting that, you might as well just remove everything from that ride leaving nothing but a shed and some track and theme it to Mad Max thus alienating a good chunk of your patronage.