Board Thread:General Discussion/@comment-26443838-20150603124705/@comment-25926288-20150603133659

We won't be able to tell without adequate information and knowing the storyline.

Predicting this storyline as the closing to part 2 of Once (Part 2 to me is 3b and onwards), it should end with season 5. Finding the author to many was a series ending storyline, breaking the curse was a series ending event (which happened in S1 and S3a), now this great battle against the Darkness should end the series, because what would be next? Random villain #4534, or something supposedly stronger than the Darkness (I doubt it).

Potential-wise, they had a chance at 7, 8, or maybe even 10 seasons, but ....well, we know Once has LOST Potential in every season and storyline and potential storyline.