Board Thread:Spoilers!/@comment-26159109-20150928143524/@comment-25926288-20151102214549

http://www.tvinsider.com/article/50252/merida-mulan-red-riding-hood-storm-camelot-on-once-upon-a-time/?utm_source=twitter

So, Red, Merida, and the honorable Mulan team up against a problem--a Wicked problem. They face off against Arthur and the Wicked Witch.

That'll probably explain the venom potion and Greenie being seen.

I guess Arthur killed Merida's father...don't know how they relates to Zelena....or Red or Mulan.