The project is currently in early development, with no other stars currently attached, but sources are reporting that there is a possibility they could appear in guest spots.
The series, which is being penned by Once Upon a Time creators Eddy Kitsis and Adam Horowitz, will be a six-episode limited series musical event with composer Alan Menken also in talks to return to craft music for the series.
It went on to be a major box office success, grossing over $1.25 billion worldwide on a production budget estimated between $160-255 million.
Shortly after the three left the series, discussions of this new project reportedly began.