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First, "Cora brings the giant to Storybrooke, where he unleashes vengeance on the town." That sounds like a BIG problem. Though the synopsis also says "Anton the Giant befriends humans," so things could work out, unless that's just the flashback.
Meanwhile, "Greg asks Belle what she saw on the night of his accident." We assume "Greg" is the guy who crashed into town last week, which means the townsfolk decide to let him live on Season 2, Episode 12: “In the Name of the Brother.” We're shocked, shocked to find that moral action wins the day in Storybrooke. But why is Greg prying into his accident? Does he think he saw magic?