Former Lost writers Edward Kitsis and Adam Horowitz told Spinoff Online that the fantasy drama will not have a complex story arc.
"We don't want this to be a mythology show," said Kitsis. "It's about characters and characters first."
Horowitz explained that each of the show's mythical characters, including Snow White, Prince Charming and Rumpelstiltskin, will be portrayed in a "real" and "relatable" way.
"Every character on the show, male or female, we approach in the same way," he explained.
"The very first thing we wanted to do was go from icon to real person," added Kitsis. "[The female characters are] strong women [and] they're inspirational, which is why in the pilot you see Snow White with a sword when the Evil Queen comes in, instead of hiding behind her husband."
Kitsis and Horowitz previously claimed that Once Upon a Time will explore the unresolved mysteries of famous fairy tales.
"We're not interested in retelling fairy tales," claimed Kitsis. We're interested in the parts that have holes that need filling in or the parts you've never thought about."
The series premieres on Sunday, October 23 at 8/7c on ABC.
> Alan Dale joins new fantasy drama Once Upon a Time
Watch Edward Kitsis and Adam Horowitz discuss Once Upon a Time with Digital Spy below: