Board Thread:Spoilers!/@comment-6175354-20141215234519/@comment-24674051-20150219180539

Also, while we may not get Will's direct backstory, he is involved with the Robin Hood backstory, so we will get to see at least some of his story there.

Also, We know we are going to get at least portions of the Sleeping Beauty arc (which would cover Maleficent, as well as finally giving Aurora and Philips story), but that is definitely after 4x14, which is a Maleficent story, but involves more of her dealings with Regina (and maybe some of the other cast?). So unless they are going to wait until 4x20 or later (which puts it in the middle of whatever mini-arc is occurring with Agnes), my guess is with Lady J that 4x16 must be the other Maleficent centric.

Another thought, I wonder if Lily will forgive Emma for running out on her? Adam said that one of the focuses for 4B is forgiveness. And with just what we know of the current cast of characters (including Guests) there's plenty that needs to be forgiven.