The show runners of ABC's Once Upon a Time are saying that the upcoming season 4 finale is almost like a movie.

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Once Upon a Time co-creators Edward Kitsis and Adam Horowitz recently spoke with E! News and answered a slew of questions about the upcoming finale. With the stakes raised even higher in the Author (Patrick Fischler) storyline, this finale is going to be epic.

Kitsis previewed the craziness of the special two-hour finale.

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"This one is one of our favorite ones. It feels like a movie," Kitsis said. "We can tell you bringing to a new world and stuff we've never done before on the show. In years past, we saw Elsa, and we saw [when we] were going to Neverland, this is going to be much more like season one, where we said magic is coming and it was a condition."

The co-creators shared that there will be an Emma (Jennifer Morrison) and Regina (Lana Parrilla) dynamic that should excite fans in the season finale.

"We can tell you that the dynamic between these two women throughout the second hour is probably our favorite thing about the finale. It's just so well-done and shows how far they've come this season and from the beginning of the series."

The line between good and evil has been crossed and toyed with several times this season, and with Emma potentially going fully to the dark side, there is no telling what might result if she does anything with that darkness.

Once Upon a Time airs its finale on Sunday at 8 p.m. ET/PT on ABC. The finale will be two hours.

Tags: Once Upon A Time television ABC