Once Upon A Time Season 4 [RUMORS]: Will Kristen Bell Or Dianna Agron Join 'Frozen' Arc As Elsa Or Anna?

As "Once Upon a Time" season 3 ends with an epic finale, the final reveal has ignited some major season 4 rumors and the potential presence of a major Disney franchise—"Frozen."

By now, most fans have seen the "Once Upon a Time" season 3 finale and its final twist ending, which featured a character who is clearly alluding to Elsa of "Frozen."

Check out the scene below:

It's clear that "Once Upon a Time" will bring forth Elsa (and possibly Anna) in season 4, and rumors are already swirling as to who will originate the roles on the ABC series.

The first suggestion is, of course, Kristen Bell, who voiced Anna in "Frozen." And Bell herself would love to join "Once Upon a Time" season 4.

"That would be unbelievable. I love that character of Anna so much, she's so exactly who I wanted to see when I was five years old, so she's really close to my heart."

"We would be completely honored if Kirsten Bell or Idina Menzel wanted to do our show," said co-creator Eddy Kitsis to E! Online.

But, Bell and Menzel may be too old to play Anna and Elsa, should "Once Upon a Time" choose to make the characters around the same age as the Disney animated featured.

"Dianna Agron as Elsa please!" writes RogersBase on YouTube.

Other possible candidates, according to E! Online, include Dakota Fanning and Megan Hilty as Elsa, and Elle Fanning, Britney Snow, and Anna Kendrick for Anna.

Who do you want to play Anna and Elsa on "Once Upon a Time" season 4?