There are several excellent fan films for Star Trek on YouTUBE. I spent this weekend watching an animated trilogy (11 hours total) called 'Time Warp'. It wasn't a brilliantly original work of art (the fact that the animator couldn't find a voice cast and ended up voicing all the parts himself being particularly distracting). But the underlying story is well done. It could have done with tightening up in places but, overall, a Trek very much in the style of the golden age of TNG (season 4-6).
If it had a proper voice cast and the script was a bit more tightly edited, it would compare or even transcend the limp and flabby J J Abrams offerings. The characterisation is more generally likeable and sympathetic and, whilst pathetic in his motivations, the villain is far more interesting and believably threatening than the bald Romulan in ST-2009 or the False Khan of ST-ID.
IMHO, not only has the fandom sustained and maintained Trekdom during one loss of interest by The Powers That Be, it is quite possible that fan films and fan series may continue to sustain it during the current cynical period in official attitudes towards the show. Lots of people say this but, sometimes, it takes the fans to remind you why you loved a show. These fan works generally are better than the 'professional' productions at every level.