Things will be hot, lukewarm and decidedly cold when ABC’s Once Upon a Time uncorks Season 4 on Sunday, Sept. 28.

RELATED Once Upon a Time Casts Fringe Alum as Frozen‘s Queen Elsa

Chatting with Michael Ausiello in TVLine’s San Diego Comic-Con video suite, Jennifer Morrison, Lana Parrilla, Josh Dallas, Colin O’Donoghue and Jared Gilmore fielded a flurry of burning questions, including whether an Evil rivalry has been reborn, now that Emma has lugged Robin Hood’s “dead” wife Marian to Storybrooke.

Emma, for her part, feels “guilty” about derailing Regina’s nascent romance, Morrison says, while the general consensus about Robin’s dilemma is: “This poor guy!” (Apparently Sean Maguire has been pulling for a Big Love sort of scenario. As if Regina shares.)

Morrison and O’Donoghue then share the forecast for Emma and Hook (as well as the pirate’s imminent “makeover”), Dallas promises fresh drama ahead for the Charmings, and we ask Gilmore if Henry perhaps saw Frozen while living in NYC — seeing as Elsa, Anna and others from the animated blockbuster are blowing into town (…if they haven’t been living there already).

RELATED Once Upon a Time Mystery: Who Is Elizabeth Mitchell Playing…?

Press play above for the scoop on all that and more — including Jared’s reaction to who Elizabeth Mitchell is playing!