Unlike previous Scooby-Doo series, this series features intra-episode story arcs, including an overarching mystery that spans all 52 episodes. Some of the material for the series-long story arc was based on development work done on an unproduced animated series adaptation of The Goonies (1985)
In developing this series, producers Spike Brandt and Tony Cervone and producer/head writer Mitch Watson began with the original 1968-69 development art for Scooby Doo, Where Are You! (1969) by Joe Ruby and Ken Spears, which included information about the Scooby-Doo characters' ages, parents, and home/school life that never made it onscreen in the original series. In Ruby and Spears' original series bible, Fred and Shaggy are each 17 years old, Daphne is 16, and Velma is 15. For the purposes of this series, the kids were made roughly the same age: 16-17 in season 1, and 17-18 in season 2.
The trivia item below may give away important plot points.
In one of the earlier episodes, a girl says her father is the Creeper and the gang mentions they remember dealing with the Creeper. However, the Creeper was never on the current series and was only on one of the earlier series of the Scooby-Doo franchise.