it has been a long time without any dev response, indeed. I am really sorry about that but there has been a lot going on in personal lives of the team and so there is almost no time to work on this mod. And frankly, a lot of community enthusiasm for modding has been lost thanks to two unsuccessful attempts of HD Interactive to create Nexus 2 and also NBC Universal banning incredible BattleStar Galactica modification.
Let's answer the most important question that you possibly have about SG: War Begins, B5: Conflicts of Loyalty 2 and W40k: Battlefleet Nexus. Are these modifications dead? The answer is NO! However, there will be no massive releases or regular updates as there is not enough free time for such things.
What is it that you should look forward to during 2014 then? SG: War Begins is going to get small update fixing few thing there and there, bringing back energy weapons and improving drone mechanics (a little) for Ancient Battleship, visually altering some parts of GUI, improving some planet visuals and very few other small things. W40k: Battlefleet Nexus might be (finally) getting a small Alpha Version release with handful Imperial and Chaos ships by the end of 2014. B5: Conflicts of Loyalty 2 ... well, let's say that we will see what we can do if there is enough free time for this one too.
---In the meantime, have fun playing Nexus: TJI