I intend to mix it up with a whole slew of (around ten or so) other systems, the rules of which I will completely ignore in favour of the spirit in which they were intended - after I've done terrible things to that spirit in the dark (the kinds of things that would make even Clive barker turn white in horror ;)
And I can see Disparateum forming a significant hub (spiritually twinned with, but not as harmless as, Fallen London), in a KATABASIS plane inhabited by the lost spirits of (Little Fears) children who don't know they're (Nobilis) Powers - amongst other things.
I anticipate it being the kind of place I lead the players to in the anticipation that it will be a glorious Abarat/Imajica-esque refuge only for it to transpire that it's far from it and, before long, have them weeping not only in snot-filled, underwear-staining terror but sheer nervous exhaustion (if I can induce psychotic breaks, so that they walk under cars and buses when they next set foot outside the door, I'll have done my job ; )
So, I need you to keep working on both this an KATABASIS but especially Disparateum.