"Once Upon a Time" season 4 has begun, and the 2014 San Diego Comic-Con has revealed more spoilers about the upcoming season.

According to spoilers by TVLine, it's been revealed that Regina's heartbreak caused by Emma will have its consequences on "Once Upon a Time" season 4.

"I think she has something up her sleeve. But is anyone surprised about that one?” previewed actress Lanna Parrilla. “She’s a bit conflicted. She’s enjoyed being good [and] light magic. However, old habits die hard.”

“It’s an impossible situation,” said Jennifer Morrison. “I can’t apologize for saving a life. Yet I’m horrified that I’ve gotten in the way of Regina’s happiness… It adds a nice element of conflict and concern and generosity.”

Meanwhile, Rumbelle fans can breathe slightly easier, as spoilers confirm that the wedding vows were the real deal despite Rumple's betrayal.

“When we wrote it, he absolutely loved her,” said co-creator Eddy Kitsis. “Those vows were genuine. But that doesn’t mean he doesn’t have his weaknesses.”

“I think the story’s got a long way to play. I think this dagger may come back again, and get lost again, and come back again…”

But most importantly, "Once Upon a Time" season 4 has shown its first footage of Anna and Elsa, portrayed by Elizabeth Lail and Georgina Haig. And while we don't have the video footage, we do have stills from the scene shown at Comic-Con.

In this scene, the sisters visit their parents' grave, and Elsa tells Anna she has a surprise for her before her wedding.

You can check out the video below for some stills from "Once Upon a Time" season 4.