I believe scott said once that when the book is re-written, it is written at the new place in the timeline. So when Earthcore is rewritten, it will be in the timeline after Ancestor (which is why we get a little preview of the character of Patrick O'Doyle in Ancestor).
Nocturnal in its original release didn't have any big gummint agencies as I recall. It was all local PD. So Longworth's involvement seems unlikely. But in the rewrite, I guess we'll see what happens. There was a cross-reference from Nocturnal to Ancestor in the original version of Nocturnal, too.
One thing that needs to be resolved in the rewrite of Earthcore is that its corporate headquarters were originally set in downtown Detroit, and I believe it was in the Renaissance building, which I believe was "negatively impacted" by the events in Contagious.
What would be cool is Nocturnals talking derisively about the wannabe-savior Hunter Hunterson!
Gutter Sistren whipping boy, innoventor of words, Life Coach to the Damned.