The general line between fan fiction (or any type of fan work) and a professional one is whether the production is trying to make money.<p>That&#x27;s why fan films and series are likely to be shut down if they try and market them via Kickstarter or Patreon or a similar service or distribute them on a service where money is involved (like Steam, or as a published work on Amazon).<p>If they&#x27;re trying to make money from this Star Trek film and don&#x27;t have permission from the franchise owners, then it&#x27;s not particularly surprising that they&#x27;re being sued. It&#x27;s a similar situation to a certain Zelda movie that got shut down when it tried to sell tickets to cinema screenings.