This is from an interview with Jennifer Morrison:
Twisted Sister: We knew that the Snow Queen (Elizabeth Mitchell) was going to send a flurry of drama to Storybrooke this season, but we had no idea that she was going start a thunderstorm of crazy. “Things are getting more intense in terms of realizing what’s going on with the Snow Queen and her plans, and why she’s been trying to get Elsa and Emma more ingrained in her life in some way,” Morrison explained.
“She’s on this bizarre crusade to just wipe out everyone else and have these two women replace the sisters that she lost,” the actress said of the Snow Queen’s evil plans. “She’s clearly not well. She’s extreme about it, and so we realize how intricate her plan has been, and how far back her plan goes. It’s all coming to a head at this point.”
Unfortunately, Morrison unveiled that the drama is not going to end anytime soon. “By episode nine and ten we’re still really struggling to overcome the big picture,” she admitted. “We’re winning some of the battles, but feeling like we’re still losing the war.”
To make matters even worse, the Snow Queen is fiercely determined to unleash a darkness that the citizens of Storybrooke have never seen before. “There’s definitely a lot of turmoil going,” she said. “The Spell of Shattered Sight, which makes everyone see the worst in each other, would mean everyone would basically destroy each other.”
Although we’re not going to reveal exactly when the spell hits, Morrison did tell us that evil is on the horizon. “It is coming and it does descend on the town,” she spilled. Thankfully Emma kept her powers!
4x09 Fall - 4x10 Shattered Sight - Once Upon A Time - Snow Queen - Spoilers