I didn't think to record a video clip, I might go back later and capture the cutscenes, but the ending cutscene of the DLC shows Jupiter, then space, it distorts in the shape of Mobius, and the two earths appear, the screen flashes and its one earth alone,

It then cuts to this, and a bright blue light appears on the top right and it flies towards the planet, then it ends. You can see the light in this picture. This is going to get tinfoil hat conspiracy, but the fact they set up that Vector Industries exists in this world, AND its the same world as Xenoblade X, this makes me think what we are seeing is the ending of Xenosaga 3. Kos-Mos is left adrift in space, perhaps floating towards Lost Jerusalem, which is now found again, after the ending of Xenoblade 3. The light IS blue after all.
In fact, they were literally telling us that X is the same world as Saga ever since X came out

The Samaarians arrived from another plane at the dawn of the cosmos, interesting, that seems familiar.

Abel's Ark, which returns to the dawn of the cosmos at the end of each cycle.
I'll leave you with that, I couldn't be happier right now, it seems like they found a way to tell Perfect Works after all, AND still make money off the Xenoblade name while doing it. I think my favorite part of all this is that all of these connections are literal background noise in the Xenoblade story. Anyone who hasn't played the prior games (pretty much every Xenoblade fan ever since 2 came out) is going to have this just go over their heads. I EAGERLY await the X port, and the highly likely Xenosaga remasters. This DLC turned me from a bitter pessimist who was resigned to never having a proper Xeno game again, to an optimist ready for the future.