Re: The Trek fan film you always wanted to see..?
A story arc would be a definite plus, especially if it's not just some big effects-heavy war against enemy XYZ.
One thing I'd like to see more focus on is the world outside of Starfleet and the like.
So far, Aurora seems to be the only project that really did go there and told a good story.
Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.