>>113532230I think what happened is:
So you have the overall plan. "We want a Hanna Barbera cinematic universe". Okay. How do we do that? Who is the most popular character? What do other cinematic universes have?
Scooby Doo is popular. Other cinematic universes have superheroes, and the superheroes have origin stories. We want Scooby Doo and we want him to be a superhero and this is his origin story.