As you say they are 'Supposed' to be on origin over the weekend now, and also in test Anti Virtues.
But a little dickie bird mentioned to me these guys are kinda like the 6 horsemen of the apocalypse, and we wont be seeing them REALLY until pub 54. And then, stand back and beware.
But, all pub 53 updates have had that one line dangling us in anticipation- Mysterious Strangers Have been sighted etc etc.
Personally, I gambled they are the same kinda folk who appeared in Old Haven before it went boom, so Ive been and grabbed the now very cheap (25k a bit) Black Rock in the vain hope they will..........you know the rest.
After all the war of shadows is still very much based on the Lords and their lust for BR....Maybe the roll of the dice will pay off, if not I got a nice pile of black rocks to make into a rockery.
But if the little Robin is right, they wont really be seen to effect until pub 54, and then.......oooooeeerrrr
PS:- The Robin is usually spot on.....