I suppose this is both a fun fact and Scooby "news," as this was just revealed last week.
The original cut of the Scooby-Doo live action movie was far different than what the final version of the movie ended up being. In a shocking Facebook post by movie director James Gunn, the writer revealed on the movie's 15th anniversary that the first Scooby-Doo live action film was originally to be rated R with several edgy scenes, including some featuring the female stars (Linda Cardellini and Sarah Michelle Gellar) wearing very low-cut outfits. In addition, through a bit more digging around on this, it seems Velma's character was going to completely redone so she was a completely
different character than the brainy, nerdy girl we know and love today. One of these character revisions included Velma lusting over Daphne and a make-out scene between the two characters. Another scene would have had Daphne being frightened and convincing Fred to have her stay in his hotel room, which led to the two of them having sex. In the end, the MPAA board denied all of these controversial scenes and essentially told the filmmakers they would have to drop the aforementioned controversies unless they wanted an R-rated movie. Before the movie's release, James Gunn wrote a new script which edited out all the sexually promiscuous content, which is the version we all know today.
Check out James Gunn's entire Facebook post here. All other information on the movie taken from this article.