Board Thread:Spoilers!/@comment-6175354-20141215234519/@comment-25355646-20150310214835

Hmcooper4 wrote:

4x21 and 4x22 are purely random guesses, since we have not had any specific information released on them yet. But I think both stories will need to be told to finish out the current season, and they can occur in either order, this is my guess at the most logical.

4x21 - Some sort of Will Flashback, specifically to the events that happened in Wonderland, and how he ended up seperated from Ana. (Hopefully they will be able to get Emma Rigby to Guest Star as the Red Queen).

4x22 - Flashback on the Sorcerer (including a reveal of who He/She is), and whatever setup is needed for Season 5. I don't see how Emma Rigby can't be seen. A&E said that we will find out how Will got to Storybrooke and what happened to him and Ana. So I think we will be seeing a lot of worlds shown in Season 4 as a whole. There's been Storybrooke, LWM, EF, and Arendelle. We know we're gonna see Oz, probably Atlantis and Neverland (Hook was probably in Neverland when he met Ursula), the door that leads to the Author, and maybe Wonderland (Anastasia).

I think Rumple and the QoD will get Jefferson's hat so they can find that door where the Author is and Will tries to go through it to find Ana.