The
Fading Suns/Noble Armada universe was created by
Holistic Design, who retain the rights to the setting's IP. Originally, Holistic published the early editions of the
Fading Suns RPG themselves, as well as the first incarnations of
Noble Armada (which used a different game engine than
A Call to Arms, and was perhaps closer to
SFB or
FC in terms of scale - as noted above, it even had diagrams for various ships, allowing for more in-depth boarding actions).
Nowadays, Holistic have an agreement with Mongoose which allows
A Call to Arms: Noble Armada to exist, and a separate licence with RedBrick (which was passed on to
FASA Games when the former was folded to make way for the latter) covering the ongoing development of the
Fading Suns RPG.
(I just noticed that FASA Games have posted
a new Jumpweb map, showing the area covered by the various sub-factions of the Phoenix Empire. Other jumpweb maps show the full extent of Kurgan, Vuldrok, and Vau space; the border systems on this map only show how those farther regions intersect with Alexius Hawkwood's domain.)
There had been talk about FASA 2.0 doing their own version of the original
Noble Armada game engine, but not much has come of it as of yet. But even if it were to happen, I would imagine the intent would be to complement, rather than compete with,
ACtA:NA.
But there may be someone over on the
FASA Games forums who would be in a more informed position to speak on this concept, such as it is at this point.