Bucky Barnes wrote a bunch of letters before his "death". Steve knows them by heart already, but it's only now that he truly receives them.
Post CA:TWS. When danger arises, Bucky Barnes is there. But is it Bucky Barnes or is it the Winter Soldier?
Emma Swan needs time to realise how much she actually loves a certain pirate. Hopefully, she won't be too late to admit it.
The boundaries between worlds go crazy and random portals open regularly in Storybrooke. They pull people in without them realising what's happening, taking them to the Enchanted Forest. The problem is: it is a one-way ticket. There is no coming back, unless you have the right tool. When Killian Jones is pulled into a portal such as this, Emma Swan jumps after him.