Parts of this appeared on other boards but were written door me and the original appears in the Gaius forum...

Gaius: "It seems you're a hero."

Merlin: "Hard to believe, isn't it?"

(From the Dragons Call)

Well, that wasn’t hard to believe but I know this is going to be hard to believe: Morgana has been following the Hero(ine)'s Journey. Had the writers ended that Journey at S04E12, she would be the "failed hero" for having taken on many of the characteristics of a villain. Indeed, she was the villain. But, if the writers wanted, Morgana could easily gain redemption door transitioning into a hero....