Upon completion of his ''
Foster's Home for Imaginary Friends series in 2009, Craig McCracken planned a career in publishing his own comics or graphic novels, a more "intimate [and] direct approach to cartooning" in contrast to working with a large crew for a television network. During that time he made a comic strip entitled The Kid from Planet Earth'', about a young boy who fantasized about becoming a superhero. He later realized that, in order to have the characters "learn, grow and change," he would have to tell the story with a serialized format. Knowing that "[no network] would want it at the time", he put the idea aside until 2015, when the industry of animation became more accepting of serialization within kids' animated series. The series was then pitched to
Disney, who ultimately passed on it in favor of
The Owl House. Upon learning that
Netflix were setting up an animation studio and was looking for new shows, he went to their studios on a Thursday and presented the animatic as a pilot. McCracken and his old friend
Rob Renzetti served as executive producers for the show. Netflix's animation division is leading production with a team of approximately 45 people. Having produced solely for television in the past, McCracken felt that he now had more creative freedom to pitch projects that had a darker tone or that could work as a movie, something that television channels "might shy away from". Stylistically, the show is meant to resemble the visual look of classic comics such as
Hank Ketcham's
Dennis the Menace and
Hergé's
The Adventures of Tintin, Spaceships, cars, and major locations like Mo's Oasis Café are often represented by 3D models. McCracken affirmed that some of the ideas explored within the show are also based on things that he personally experienced, such as the loss of his father at the age of 7, similar to the protagonist, who lost both of his parents. The dynamics between Kid and Jo are loosely based on McCracken's relationship with his older sister and are similar to those of Mac and Frankie in ''Foster's Home for Imaginary Friends''. Rosa's "playful spirit" is also a reflection of the creator's young daughter.
Kid Cosmic also plays on the theme that "heroes help, not hurt", which means the characters often show a compassionate attitude toward their adversaries. This strays in tone from McCracken's first popular work,
The Powerpuff Girls, which he described as a "
campy parody of superheroes". He declared: "I really didn't want to tell a story to kids that said, 'Hey, if you get great powers, then you can go and beat up bad guys and be violent and win.' I didn't want that to be the message. So I asked myself what a real hero is". ==Music==