Emma: "There's a real driving force behind what Emma is doing and why. Emma [before] was a very smart person who did things for a reason, and that translates. It's not a rampant evil that's been unleashed. Emma is going to do something particularly bad, and to the people she loves"
Camelot: It's not as if that realm's denizens are just sitting around, waiting to help out. "You'll see a bromance between Charming and King Arthur, but others might be more skeptical [of our heroes]," Kitsis says. The people of Camelot, after all, "have a similar goal to ours."
Quest to revive Rumple: Belle will team with Brave's Merida during her quest to revive Rumple.
Zelena: "...while everyone is advised to be frightened of pregnant Zelena -- "and in the premiere, you will see why," Kitsis teases."
Ruby(?): "I hope there's a full moon this year," Kitsis shares. "You never know who might come out…."
Source: http://tvline.com/gallery/fall-tv-2015-season-premiere-spoilers/#!35/undefined/