Since it is a fan-made project, everything is possible...
But as it seems, they have come really far with it - the "Prequel" contains most of the technical aspects that will be used in the full game, there are only some "minor" details.
I see a fair chance that the game will be finished.
I just hope the adjust the difficulty a bit - I have no problem with the flight modes (I have experience from I-War with it, and I love it), but the missions proved very difficult.
There is one mission where you have to protect two freighters from being destroyed - but when you enter, the one is already heavily damaged and you need still some time to get to the enemy ships. And it`s not very easy to shot that raiders down - they can take a few hits, and they aren`t standing still...
Mustrum Ridcully