Is this a clue that will ultimately spare Emma?
A running theory speculates that, sometime in the future, Emma has separated from her other half.
So, could viewers actually be seeing a doppelganger of Emma being killed by Gideon in the prophecy?

Credit: ABC/Jack Rowand
No, executive producer Adam Horowitz tells EW.
Alas, there goes that theory.
But the question still remains why Gideon would want to kill Emma in the first place.
And that becomes a launching off point for a lot of the storytelling in the second half.
Once Upon a Timewill return in March on ABC.