I've read Healer, Dydeetown, Wheels (I'm still looking for a vintage copy of EotS) and although I know that much of it was written first, it is the future of Jack's earth, right?
So no Otherness at all? I know the big "R" gets a whuppin' in Nightworld, but that's just an agent, not the big O itself. It seems like there would be signs of the struggle across the galaxy.
Is there a temptation to go back to Healer and add icons of the Kicker Man -- or a link to the Dat Tay Vao? Big concrete rune-encrysted cylinders on a Tarkan planet? Vanek ladies with dogs?