The ABC hit series "Once Upon a Time" has been renewed for season 5, network bosses announced, as spoilers mean very bad news for the characters of Storybrooke.

Co-creator Adam Horowitz shared the news on his Twitter as he wrote, "Season 5 of #OnceUponATime is officially a go! Thank you all for your support! Excited to bring you more!"

"ABC's only other move thus far this spring on any of its current series was the cancellation of Revenge, which wraps its four-season run on Sunday at 10/9c," said TVLine.

In February, however, a promo teaser was released which suggested that "How To Get Away with Murder" will be back for season 2, even if ABC bosses have yet to confirm it.

Meanwhile, a new promo clip suggests that the Author has very bad intentions for Storybrooke as he forms an alliance with Rumple.

The synopsis teased spoilers for "Once Upon a Time" two-hour finale as it reads, "The Author proves to be a formidable wild card and forges an alliance with Gold. Emma, her parents, Hook and Regina scramble to stop them, but when Gold and the Author turn the tables on heroes and villains alike, the prospect of any happy outcome appears worlds away."

"Henry discovers he has big shoes to fill as he steps up to save his family before the story's final page is turned. It's a race to the finish, and everything culminates with a shocking twist that will leave the residents of Storybrooke reeling."

Edward Kitsis told The Hollywood Reporter that the finale will set the table for when "Once Upon a Time" is renewed for season 5.

He explained, "We certainly are setting up for what next season would be at the end of the finale this year, but we're doing it in hopefully a different way than we've done before."

"It's probably a little more reminiscent, in a way, to season one, where a condition [was set out] that magic is coming, versus having a new villain of the year or a journey to a different world."

The two-hour finale for "Once Upon a Time" season 4 titled "Operation Mongoose" will air Sunday, May 10 at 8 p.m. on ABC. Tune in for more spoilers before then.