Michael Seitzman is set to pen the script for 'Book of Enchantment,' based on the book series by Serena Valentino.

The villains are ready to take the spotlight.

In a flip of the script on ABC's beloved fairy tale drama Once Upon a Time, streaming service Disney+ is prepping a Book of Enchantment TV series based on the Mouse House's iconic villains.

Adapted from author Serena Valentino's book series spotlighting Disney villains like the Beast, Ursula and the witch from Snow White, the drama, which has been in the works for months, will be penned by Michael Seitzman (Quantico, Code Black). Seitzman will also produce via his ABC Studios-based Maniac Productions, which he runs with Christina Davis. The project hails from ABC Signature Studios.

This is the latest TV series in the works for Disney+, the company's upcoming direct-to-consumer streaming platform designed to compete with Netflix. The platform, expected to launch in the fourth quarter, also has a slate of Marvel shows featuring stars from the Disney-owned cinematic universe, multiple live-action Star Wars scripted series, High Fidelity and a new take on High School Musical, among others.

Seitzman, meanwhile, is also overseeing another massive universe for a streamer with Hulu's John Grisham franchise that includes The Rainmaker and Rogue Lawyer. The multiple-series Grisham Universe will feature multiple other series, all able to be interconnected while also standing alone.

The villains concept arrives as Disney has already tackled a version of the same story on younger-skewing Disney Channel's hugely successful Descendants TV movie franchise. A third one will air this year.