As for the scarback blessing, I've taken that to be referencing Qresh. This was the motherworld of the Quad.
Not the part I'm referring to. Here's the actual litany:
http://transcripts.foreverdreaming.org/viewtopic.php?f=347&t=20033
And the roots grew. The seed traveled, from a home that we've forgotten, finding soil on Qresh. And the roots grew. From one world to two moons, one mother tree to unite us all. And when we rise, her branches hold us. And when we tire, her trunk shelters us. And when we die, her roots will carry us home. Praise the trees.
So "a home that we've forgotten" is not Qresh, it's the place from which humanity came
to Qresh. Implicitly, it's Earth, because that's where "the seed" -- human life and the biomes that humanity has brought with it across the stars -- originally came from.
Without any specific references to the location of The J, I dont see why we can dismiss that it isn't in our galaxy. The Milky Way has between 200 and 400 billion stars. We've not mapped much of the galaxy yet. The J could easily be in the Delta Quadrant (to borrow a phrase).
While there are star clusters within the galactic disk itself, they consist of very young stars only recently emerged from their stellar nurseries and still closely associated. By the time they get old enough to have habitable planets, they've been scattered by the currents of the disk and are no longer clustered. So if there are inhabited worlds in something called a "star cluster," that implies one of the globular clusters in the halo of a galaxy -- or perhaps it implies that the term is being used loosely to refer to an actual galaxy, which is entirely possible given the crappy understanding of astronomy you find in most SFTV shows.
Okay, I went to the Syfy On Demand channel on my cable and rewatched the opening moments of the first episode. It begins with a flythrough of what looks like a bright orange spiral galaxy, more compact, fat, and fiery in color than the Milky Way. Once it passes over the core of that galaxy, the caption "J Star Cluster" appears, then fades out as the vantage passes out of the galaxy and closes in on a single star sitting alone in its outermost fringes. The camera swoops over the star to reveal the four worlds that are identified by the caption as the "Quad Planetary System."
Granted, one can't take astronomical images too literally in sci-fi shows, but it certainly seemed to be saying that the J Star Cluster was that orange spiral galaxy. It couldn't have been a cluster in the halo of that galaxy, since the Quad's star was just floating there all by its lonesome; the J itself was the only agglomeration of stars visible in the sequence. So I think we can safely conclude that the J is meant to be a different galaxy, far from the Milky Way. And that, along with "a home we've forgotten," implies the show is quite a long way in the future.
Don't get me wrong. I am just as willing to accept these are set in separate universes. I simply do not see anything that would prohibit the two from being in the same universe.
Huh? I never said they couldn't be in the same universe, just that they'd probably be in different places and times within that universe. Like, say,
Star Trek: Enterprise vs.
Star Trek: Voyager, or
The Caves of Steel vs.
The Foundation Trilogy -- same universe, different eras. So continuity cross-references would be possible but direct character crossovers unlikely.