The upcoming fourth season of ABC's Once Upon a Time will feature a slew of characters from Disney's Frozen, and fans can rest assured that the film's main villain will not have changed for the series.

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Among the various Frozen characters set to appear on Once Upon a Time the villainous prince Hans (Tyler Jacob Moore) will continue with his sociopathic tendencies. Once Upon a Time show runners Edward Kitsis and Adam Horowitz previewed the role Hans will play in Season 4 to Entertainment Weekly this week.

"He has not been redeemed," Kitsis asserted. "He's a sociopath."

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When the publication offered the theory that Hans might be the one who put fellow Frozen character Elsa (Georgina Haig) in Rumplestiltskin's (Robert Carlyle) vault, Horowitz admitted that this was a mystery they "intend to unfurl" in the new episodes.

Horowitz added that Hans "still feels the weight of being the youngest of 12 brothers, and there's a very good chance of seeing some of those 12 brothers."

Other Frozen characters set to appear in the new season of Once Upon a Time include Elsa's sister Anna (Elizabeth Lail), Kristoff (Scott Michael Foster) and Pabbie, the elder troll (voiced by John Rhys-Davies).

The premiere episode of the season is titled A Tale of Two Sisters a rather clear indication that Frozen will be invading the series right away.

Once Upon a Time Season 4 premieres Sunday, Sept. 28 at 8 p.m ET/PT on ABC.

Watch a promo for the new season here:

Tags: Once Upon A Time television ABC