Board Thread:Spoilers!/@comment-25926288-20161115161303/@comment-24674051-20170313160819

I think that the flashbacks will be on one event that was hinted at in previous seasons. It will include Beowulf, but it will also include the time that Rumple stepped on the Battlefield in the Ogre War and stopped the fighting. (probably one of the few truly noble acts that he has done).

We'll get more information on the fated Sword, and we may even see that sword return whole, opening the way for a later rematch between Gideon and Emma.

That's my latest prediction, anyway.

Also, we will see Killian in the present day struggling to deal with the knowledge that he was the one that killed Robert, and his guilt over that event now. (i'll leave other speculation on this story line out, since I don't think it will be resolved in this episode).