Board Thread:Spoilers!/@comment-6175354-20140420035659/@comment-24697901-20140423102824

My ridiculously far-fetched theory:

The bird that showed up and gave Hook that memory potion for Emma was Aurora in disguise. What if she realized what Wicked tricked her into telling everyone was back, and why. She felt guilty about turning Snow & Co. in, and asks Glinda to help her fix it. As a result, she finds herself getting turned into a bird and flying off the find Hook. As a bird, it would be physically impossible for there to be a human heart in her body. Therefore, Wicked could easily trick Phillip into thinking she was gone by killing a Flying Monkey and disguising the body into (human) Aurora's, like with what Cora did when she abducted Archie. Convincing him he could save her by removing her heart--Phillip doesn't seem to be the sharpest knife in the drawer as far as magic is concerned given the Wraith thing--he does, and then she removes his, making him sacrifice it.

Like I said, ridiculous.