Black Hole Series -- I hope not!
Lots of the speculations engendered by Kevin Maroney's hints (and some before that -- it isn't his fault) revolve around what I call the Black Hole Series philosophy. That is, Urth is Green (or Blue), Blue is St. Anne, Silk is Severian, Seawrack is Merryn, Horn is Silk's cousin, Horn is Severian's second cousin twice removed, Marble is Jonas, and so on, until every detail of the author's earlier works is sucked into the black hole of the current one.
In these sorts of series, it turns out everyone is related to everyone else, all the mysteries are cleared up by connecting them with chains of infodump to all the other mysteries, gods fly down from the ceiling on wires, galactic conspiracies are exposed, and the whole enterprise is revealed to be a shaggy dog story. Asimov's attempt to spot-weld the Robot stories to the Foundation series is the Milli Vanilla poster-child-classic of this genre, and Niven's "Down in Flames" is the intentional reductio ad absurdem.
With all due respect to those who are speculating along these lines, that isn't gonna be what Wolfe is doing here. He's too good a writer for that.
I hope.
-- Dave Lebling
(aka vizcacha)
*This is WHORL, for discussion of Gene Wolfe's Book of the Long Sun.