Board Thread:Spoilers!/@comment-25926288-20160401211843

http://www.hollywoodreporter.com/live-feed/once-a-time-greg-germann-879834

So, it would seem that Poseidon was flushed out of the story as always. If anything, Poseidon should have the real grudge. Zeus gets the top spot, Hades gets the next top (haha) spot, and Poseidon has to deal with charming, cunning pirates.

So, it's a Hades/ Zeus and Zelena/ Regina Parallel.

And apparently Hades is going up to the Overworld (specifically Oz) for some business. Didn't know Zelena was a secret mass murderer. XD 