Rumple’s “circle of time” line definitely jumped out and reminded me of this Wheel of Time related theory.
Can they really leave Snowing walking around, sharing a heart for all time? Couldn’t that make them weaker as a team, if one of them dies, would the other die by default?
Are they really gonna leave Philora as Flying Monkeys for all time? Aurora hadn’t even had the baby yet, so if they stay monkeys, that baby never gets born, which is rather tragic. Were they potentially two of the monkeys that got shot? Were innocent SBers like Little John and missing Dwarves potentially among the monkeys that got shot? That would be pretty tragic.
They could resolve both the shared heart issue, and the monkified (and potentially killed) people issue by turning back time so those events never happened.