'Once Upon a Time' Season 4 Spoilers: EP Adam Horowitz Teases Episode 16 Title On Twitter

Actors Ginnifer Goodwin And Josh Dallas, Right, From The TV series 'Once Upon A Time.' — Actors Ginnifer Goodwin and Josh Dallas (R) from the TV series "Once Upon A Time&" arrive at the 15th Annual Costume Designers Guild Awards in Beverly Hills February 19, 2013. Reuters

"Once Upon a Time" executive producer Adam Horowitz continues to tease the fans on social media site Twitter with details on the upcoming second half of season 4. In a recent post, Adam Horowitz revealed the title for the upcoming "Once Upon a Time" Season 4, episode 16.

"Here's another #OnceUponATime #titlespoiler -- hope to see ya March 1st!" Horowitz posted on his Twitter account @AdamHorowitzLA on Thursday, Jan. 15, as a caption to the image shared. The photo revealed that "Once Upon a Time" Season 4, episode 16 is titled "Best Laid Plans."

A Carter Matt report suggests that the episode will be focused on Rumplestiltskin/Mr. Gold (Robert Carlyle) since the OUAT character has a plan, which is to find "The Author," in order for the villains to have a happy ending. In the mid-season finale episode, Belle (Emilie de Ravin) kicked Rumplestiltskin/Mr. Gold/The Dark One out of Storybrooke after finding out her husband's treachery and evil plans.

In an ETOnline report, Adam Horowitz teased that "Rumbelle" will be apart when the ABC fairy tale drama series return but it does not mean that their story is already over. "What I'll say about this, in all seriousness for the Rumbelle fans, is that definitely Rumple (Robert Carlyle) and Belle (Emilie de Ravin) are not over," the executive producer stated.

Co-executive producer Edward Kitsis added that "Rumbelle" is a complicated relationship. "I know that we're in the middle of the book, and for us we are telling a bigger story. What we loved [in the winter finale] was seeing Belle's strength. And we set up Rumple's weakness," Kitsis explained.

However, Adam Horowitz pointed out that the second half of "Once Upon a Time" Season 4 will not only focus on the dark chapter of the "Rumbelle" relationship. "It's just one chapter. We're telling a larger story and there are more chapters to come," Horowitz teased.

When it comes to happy endings, Edward Kitsis also teased something on Regina/Evil Queen's (Lana Parrilla) happy ending. The OUAT character also had to let go of her true love Robin Hood (Sean Maguire) in "Once Upon a Time" Season 4, episode 12 titled "Heroes and Villains."

According to Edward Kitsis, the fans have not yet seen the end of the Robin Hood-Regina story. "The story is just at a middle point and although it seemed final [in the mid-season finale], I would definitely keep watching because there's much more to come," the executive producer teased.

"Once Upon a Time" Season 4 returns with episode 13 titled "Darkness on the Edge of Town" on Sunday night, March 1, at 8 p.m. ET on ABC.

Here's another #OnceUponATime #titlespoiler -- hope to see ya March 1st! pic.twitter.com/6M6u0Iuvnd
— Adam Horowitz (@AdamHorowitzLA) January 14, 2015