Board Thread:General Discussion/@comment-34924658-20150420012244/@comment-34924658-20150511191352

Yes, the Big Bad(s) is the primary antagonist/threat they have to face. Here's my opinion now:

Season 1: Regina ofc.

Season 2a: Cora

Season 2b: Tamara and Greg (Big Bad Duumvirate)

Season 3a: Pan

Season 3b: Zelena

Season 4a: Ingrid

Season 4b: Initially Gold, Maleficent, Cruella and somewhat Ursula all in tandem together as Big Bads, but then I say Big Bad Duumvirate between Gold and Isaac.