Once Upon A Time Season 4 Spoilers: New Promo Trailer Arrives, Plus Regina's Love Triangle With Robin Hood And Marian, And Belle's Mom!

"Once Upon a Time" season 4 is just a month away, and spoilers regarding the new season has arrived, including a new promo trailer.

According to the Hollywood Reporter, a brand new promo has been unveiled featuring Elsa from Disney's mega-hit "Frozen" arriving in Storybrooke, to the concern of Rumpelstiltskin, Mary Margaret, David, Captain Hook, and Regina.

Check out the promo below:

Meanwhile, spoilers confirm that Elsa will not be the only thing concerning Regina, as Robin Hood and Marian's rediscovered relationship will deeply affect the Evil Queen.

"Who says we're doing a love triangle?" retorted co-creator Adam Horowitz regarding "Once Upon a Time" season 4. "Hopefully it becomes less about the relationship itself and more about Regina [and] open[s] the door to who she is and what she’s going to become.”

In addition, spoilers confirm that Belle's mother will grace "Once Upon a Time" season 4 in flashbacks in episode 6.

According to TVLine, Belle's mom is described as "a strong-willed, spirited woman," quite possibly with a German accent.

"We are going to meet Belle's mother," added Horowitz. "For the first time, we'll delve into Belle's past pre-the encounter with Rumple."

Meanwhile, "Once Upon a Time" season 4 will also introduce a new arc featuring the cast of "Frozen," and recently, cast member Scott Michael Foster spoke up on Kristoff's relationship with Anna.

"He's obviously with Anna," Scott told HollywoodLife.com. "At the end of the movie, they're together."

According to spoilers, Kristoff is now living at Castle Arendalle with Anna and Elsa, and it will take some adjustment.

"He's a rugged mountain man who grew up with trolls, so there's a bunch of avenues he can take to expand his character, based off him not being used to palace life."

"Anna is the apple of his eye."