Board Thread:Spoilers!/@comment-2153169-20170909025746/@comment-25926288-20170913121639

Chameleon-Guy wrote: Though, if Rapunzel is just a guest for this episode, it kinda blows away the theory that she is a Swan-Jones, so yup, it's likely younger Tremaine. This is more likely. Now, I've been around and saw a ton of fanart and stuff trying to connect Tangled to Hook/Emma, but I'm certain that this is just a fan creation.

Given Emma's brief appearance, I doubt they are randomly going to make Rapunzel Emma's daughter. Plus, on the meta side, it's hilarious how every blonde person is somehow automatically theorized to be related to Emma. There were legitimately theories that tried to say that Snow wasn't Emma's mother, but Ingrid was (despite us seeing Snow give birth to Emma and the countless times otherwise proven). Guess fans gotta fancanon.