'Once Upon a Time' Season 4 Trailer: Elsa Battles for Power in Storybrooke

Once Upon a Time's extended season four trailer touts a major power struggle between Regina/Evil Queen (Lana Parrilla) and a frozen new Storybrooke visitor, Queen Elsa of Arendelle (Georgina Haig). Is there room for two queens in Storybrooke?

"I'm the queen," Elsa says before Regina recruits an old friend, the Mirror (Giancarlo Esposito), to help get rid her latest obstacle: "She needs to be removed."

The Hollywood Reporter debuted the first season four promo on Aug. 31 that hinted at Elsa's chilly debut. Several days later, ABC unveiled a 30-second spot — this time featuring actual footage — that uncovered more about the premiere.

Comic Con attendees in July were treated to a special first look from the premiere that featured Elsa and Anna at their parents' gravesite as they prepare for Anna's wedding to Kristoff.

Once Upon a Time returns Sept. 28 on ABC.

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