Board Thread:General Discussion/@comment-25926288-20151231135805/@comment-1916997-20160105035108

8Rob wrote: Are we sure? I mean, for a fact?

I mean, I'd like to get a proper final season, but at this rate the show ratings will end at the point where Revenge was when it was cancelled.

I don't think ABC would order a 22 episodes season if that happens I've been using this for several years, and it's pretty spot on. If they had doubts about Once they would have it as "Could go either way" or "A safe bet", but they have it as "A sure thing":

http://tvline.com/2015/10/16/renewed-tv-shows-2016-renewal-scorecard-cancelled-series/