In a new Once Upon a Time season-four teaser exclusive to The Hollywood Reporter , Frozen's Elsa ( Georgina Haig ) passes through the town's landmark hangouts (Mr. Gold's shop, Granny's diner), leaving her chilly mark wherever she goes. Naturally, her unwelcome presence puts everyone — from Mr. Gold/Rumpelstiltskin ( Robert Carlyle ) and Mary Margaret/Snow ( Ginnifer Goodwin ) to David/Charming ( Josh Dallas ) and Captain Hook ( Colin O'Donoghue ) — on edge. Though Elsa's face is never shown, her looming threat is powerful enough to get even Regina/Evil Queen (Lana Parrilla) to ready for the coming wrath. Just as the voiceover ominously hints at trouble for Storybrooke, Regina voices her dread, "Here we go again ....." Watch the clip after the Jump... But Emma (Jennifer Morrison), in her signature red leather jacket, has her own thoughts on the new villainess: "Really?" Frozen is getting a major presence on Once in the new seaso...