Except we do know a few things.
First: It’s not a gravitic weapon of some sort, because the gravity waves would have been easy to pick up and triangulate over the last 12 years as they moved outward through the various star systems. Yes, the initial firing event took place deep in Domain. However, it’d be extraordinarily foolish to insist that agents of other nations (or even just other Houses, since the weapon was in the hands of House Sarum) wouldn’t have made an effort to move assets into position for such a detection, given the advanced notice and relative ease of doing so. It’s not like there aren’t plenty of places to go. Heck, this is a decent representation (the circled systems showing the furthest points) of where such detectors could have been set up two years ago:
Image courtesy GARPA Topographical Survey Tool, v 3.3.1.0, © YC122, Goonfleet Advanced Research Projects Agency [GARPA]
We can also be reasonably sure that it didn’t suck them into Anoikis, given the complete lack of any sign of them in all the systems we’ve found in there over the years. Which means it likely required some form of directed energy emission. (After all, even chemical projectiles and railguns still feature directed energy emission, that energy’s just kinetic)
So we’d have needed to see some kind of unexplained directed energy emission. And, again, you’d have to be daft to not think the other nations (and CONCORD) weren’t watching like hawks for exactly that sort of thing with assets both in-space/cloaky, and infiltrated through the Golden Fleet, during the Throne Worlds campaign. It’s the sort of thing even the most utterly incompetent spymasters would think of ‘gee, an existential threat from a seemingly unstoppable foe. I wonder if that Sarum superweapon’ll show up!’
And in the years since, if such a thing had been observed—especially with the SoCT crawling all over the place throwing entosis links at everything during that time-frame—it would’ve come out. There’s been too much nonsense slung about in all directions to think someone wouldn’t have spilled the beans just to make someone else look incompetent in some way. So we can be about as sure that that superweapon, at least, isn’t still in an operational condition as we can of pretty much anything else in the cluster.
I do still have agents out searching for whatever happened to TES Auctoritas, you know. She was rumored to be packing entosis-shielding, among other things.
Except, you know, you can’t really pull out infiltrators who’ve been working to borrow deeper and higher into criminal organizations, wash them off, and send them into CONCORD’s shiny new EDENCOMM group. That’s not how that works. You’d need assets you’d been previously developing within CONCORD, and within Upwell—which means within ORE, before it, as well as other major multinational industrial powerhouses.
This isn’t the sort of thing you wave a wand and make happen. You can’t just shift budget around and go ‘POOF! We have assets in there!’ This is all operations the RSS would be moving other assets to cover, while training more people to cover the greater spread, and not disrupting operations involving unconnected groups.