The CW’s demon-hunting drama Supernatural may have announced its animated crossover episode months ago, but it was actually years in the making. “In the writers room, Eric Kripke and Ben Edlund would always be like, ‘Can we have an animated character?’ But doing that from scratch is a lot of work,” said executive producer Andrew Dabb.
When Dabb’s friend Jeremy Adams, who works in Warner Bros Animation, called and asked if the show had ever thought of crossing over with Scooby-Doo, it felt like the idea they had kicked around offhandedly for so long could finally happen.