There is a connection between Sync and the Transcendant.
If you listen to the transmissions of the Transcendant and compare them with the messages in Sync, you will notice that some of them are the same. Memories of the Transcendant?
In one mission the Transcendant transmitted something like:
"...too....luck but I'd rather take my chances with the..."
In Sync, when the Persistence is powering up again to leave Capella, Phi 2 says:
"Me too, good luck, but i'd rather take my chances with the Shivans"
Or in the last Mission of Transcend:
"Doesn't his death bother you?"
"...isn't our time to die..."
Phi 4 said the first to Alpha 3 in after the Ester was destroyed,
the second said Alpha 3 when the Ereikheten arrived.
But there are also some other things. The Sync nebulas look like the one in Transcend. The so called second Terran-Vasudan War at the end of Transcend, a reflection of the Persistence and the fighters being chased by the Vasudans. Are these the memories of the Transcendant, of what happend in Sync? Maybe the Shivans would have appeared if the Transcendant had more time to alter reality.
We have the same messages in both campaigns, the same nebulas, a reflection of events, I believe the Transcendant is Sync. Didn't Omega say that "it" was the GTVA's greatest triumph and failure, a triumph because it could do mass scale jumps, create a subspace damperfield and manipulate subspace, but also a failure because they lost the control? It all makes sense for me.
But two things still bother me, what happened to the Carthage?
And the end of the Sync campaign? If they had doomed the GTVA, how could it still exist in Transcend? Could it be that the Transcendant had altered reality before Transcend or was there some kind of restoring of reality already?
sry for typos and misspelling, english isn't my mother language