Once Upon a Time fans going to Comic-Con won’t be able to miss this tease to next fall’s big storyline: a large building-wrap poster giving another Frozen hint. The image has Elsa (Georgina Haig) laying down some frosty magic and a tagline saying that Storybrooke will freeze over (literally?). For more, see our deep-dive interview with OUAT showrunners Adam Horowitz and Edward Kitsis giving some exclusive details about their season 4 plan. For those going to Comic-Con, ABC’s OUAT panel is on Saturday at 11 a.m. in Ballroom 20.