User blog comment:GoldMan27/The Official Detentionaire: Season 5 News Blog/@comment-172.251.82.59-20150108054133

I think as of December 21, 2014  Charles Johnston said on a twitter feed that the comapny "dropped the ball". And I'm guessing that means they've dropped the entire series. The episodes for seasons 1-4 are still going to be played, but there really might not be a 5th season.