Board Thread:Spoilers!/@comment-26109288-20151219143455/@comment-6175354-20151219231304

Everthevillain wrote:
 * The point of 5B is to find Hook split a heart and get out


 * Underworld arc with Black Tooth, Fendrake, Hades, Hercules, Megara, some CGI creature, and possibly others. It brings back the Blind Witch, Cora, Cruella, Liam, Milah, Valet, a younger Baelfire and others.
 * Zelena's deportation and Dorothy's return to Oz. Dorothy will recur and appear in "multiple" episodes.
 * Ruby and Mulan's returns.
 * The possibility of Merida, King Arthur, Guinevere, Lancelot, Violet and Sir Morgan's resolution.
 * Episodes centric to Regina, Snow, Rumple, Hook, Zelena^^, Robin (According to a Hot Seat), possibly Belle (According to a Spoiler Room), and Hades which we can only hope.

So yeah too much stuff going on. My theory:

- The main characters will be in Underbrooke until either episode 5.18 or 5.19.

- 5.16 will be used to reintroduce Storybrooke and Zelena into the arc.

- Ruby and Mulan will team up with Dorothy.

- Merida, Arthur, and the rest of the Camelot crew, will get resolution, once everyone is back in Storybrooke.

- Episodes 5.22 & 5.23 will tie up every storyline from the entire Season 5, and will feel like a series finale.