When in FS2 is there ever a mention of a black hole? Petrarch only talks about the destruction or the explosion of "the star capella", never mentioning a black hole.
Actual quote: "The explosion of a star might be the bridge between this universe and their own".
What kind of cosmic phenomena is out there believed to be possibly a bridge between universes? I can only count one. 
Black Holes crush sh*t, that's all they do as far as we know. Besides we witness the Jugger fleet jumping out via subspace. Assuming it isn't an intrasystem jump, as Petrarch doesn't casually say "oh btw they're still in Capella", they must've jumped to another system entirely, suggesting at the very least they created a super node. Still it's all conjecture, all we have by way of canon is footage of the Sathanas fleet jumping out, for all we know they might very well be hiding in Capella still.
Actually here's a scary thought: perhaps the Sathanas doesn't rely on nodes for subspace travel, at least not in the same way we do. Suppose for instance, that instead of creating a supernode the Shivans jumped back to Gamma Draconis via the Cap-Gamma Drac node,
without physically having to fly to the location of the node. The Shivans have demonstrated the capability to traverse nodes too unstable for Terran/Zod vessels, perhaps the same applied to the Knossos node after the portal was destroyed: a sort of residual subspacey-ness that Sathanas juggeranauts can traverse.
Re-reading all that, it ain't smart but f*ck it, it's a video game.
Ninja'ed: beat me to the punch on black holes and nodes.
