Board Thread:Spoilers!/@comment-1916997-20150313202428/@comment-24674051-20150430134320

who knows, maybe Snow is the Evil Queen.

A lot of it will hinge on exactly where the timeline diverges. Because all it would take is one small change, just one decision,m way back in the chain to cause a full cascade of resets.

Of course, "fate is a bitch" (to quote Regina), and there may very well be other powers at work that find ways of correcting the small changes, or introducing other changes that affect the timeline. Keep in mind that, based on what the Sorcerer said in "Lily", Emma and Lily were apparently destined to have intertwined fates even before the Author's interference.