If the series is "active", i.e. the one who started it still often send pics, it is better to leave it for him.
Else for series not updated since some time, or incomplete movies, no problem. You can check the "coming soon" topic in the contributions section: in the first post there is a list of what will be done in a near future and which series are made by who... but I am not sure that everybody keeps that up-to-date (by the way I should update there the list of series that I watch )