To be honest they should have sought permission before spending four years and 10,000 Euros making the film in the first place.
Sure it sucks from their point of view, and for a lot of fans who'd have probably liked to have seen the 110 minute fan film, but they really should have thought about this and got the correct legal permission.
The problem with 'fans' is that they get overexcited and run off and start producing their own things without thinking of the legal ramifications. Yes they ARE fans of the property but that is very different from OWNING it and being able to do, and commission, new works. Regardless how good and professional they may be.
It's a shame for the people involved but as an industry and professionals there is no other choice than to support GW with this call.
I'd love to see a 40K film at somepoint though.