Before the "Once Upon a Time" season 4 premiere, spoilers have surfaced from the co-creators on the cast.

According to an interview between co-creators Adam Horowitz and Eddy Kitsis with TVFanatic, they provided a lot of spoilers about "Once Upon a Time" season 4 spoilers.

"What we do know going into the season is that somehow Elsa wound up trapped inside and urn in Rumplestilskin’s castle," said Adam Horowitz. "So, that is one of the mysteries that will be unfolded over the course of these episodes. So, we can learn how that happened, and then once she gets out, of course, there’s going to be a new mystery, which is what is she doing, why, and we learn that very quickly."

"I think you’re going to see that Elsa and Emma are going to have a friendship that we’re going to see play out," added Eddy Kitsis. "I think we’re going to realize that they have a lot in common but the 'Frozen' arc is definitely going to be affecting everybody. But at the same time, for 'Once Upon a Time' fans, we are still going to see Rumple and Belle and we know that he’s lying to her about the knife. And we have Marian, who just came back to thwart Regina’s happy ending just when the Charmings have a baby."

"We are going to be turning Frozen but not at the expense of the other stories."

Additional spoilers were also provided regarding Marian.

"I think that this Marian, when we meet her, she is very freaked out," said Kitsis. "She was in a jail cell waiting to die and then all of a sudden, thanks to Emma, she wakes up in a strange world with a strange land and she has no idea what’s going on. Like Robin Hood, she just saw him two weeks ago and never thought she’d see him again. But of course, for Robin Hood, it’s been many, many years, and they have a son that doesn’t even really know her that well."

"So, she’s really disoriented in trying to get a handle on everything. But I think one thing is it’s one thing to find out your husband thought you were dead and moved on. It’s another when you find he moved on with the person who killed you."