'Once Upon A Time' Season 4 [RUMORS]: Will Anastasia Be Anna And The Knave Be Kristoff From 'Frozen'?

As "Once Upon a Time" goes on hiatus until season 4, rumors regarding the ABC series have surfaced as it sets out to introduce the world of "Frozen."

As most fans know by now, Elsa from "Frozen" has been confirmed to appear on "Once Upon a Time" season 4. But spoilers confirm she will not be a carbon copy of the Disney animated character.

"Will there be our own elements put to it? Yes. Like all things like we do with Snow White or Peter Pan or Captain Hook, we take our own kind of twist on it but remaining faithful to the actual essence of the character," said co-creators Adam Horowitz and Eddy Kitsis to EW.

Given that Elsa has not be cast yet for season 4, a lot of "Once Upon a Time" fans are wondering what other "Frozen" characters might join her.

"I hope it'll be Anna but the same time I hope Rumple could be Hans or something. Since he's not only Rumpelstiltskin but also the Beast as well as the Crocodile! Why not Hans too. Or perhaps a troll..." wrote Rei Heath on Wet Paint.

"Or perhaps the Duke of Weasleton," added Amber Lincoln.

But there is one interesting theory out there as to why only Elsa (besides showing her awesome power) was shown at the end of "Once Upon a Time" season 3 finale.

"I have a feeling that Anastasia (Red Queen) will be Anna, and that would make The Knave Kristoff," theorized Daniel Fehring.

"I don't know about Anastasia being Anna, she's already Cinderella's step-sister. Adding Elsa to that would seem a little over the top," countered Alexander Hoffman.

However, given what "Once Upon a Time" did with Regina, Zelena, and Snow, it would seem right up the show's alley to do something like that!

What do you think?