Phase has some interesting stuff coming down the pipeline, if the hints and winks at the recent event in Iceland are any indication. That said, Photokina is not regarded as nearly as big a deal as it once was, so the announcements aren't being built around the event any longer.
In Iceland we got to test the 150 LS lens, and the battery grip. I think I detected a hint that a new 300 is coming - probably next year. The biggest deal to me, and comments I found most interesting is that the tech people at Phase see their current 645DF body as being pretty much maxed out in it's current form, and the next iteration - which they are working toward - will be substantially different. But for that, I think we'll probably be waiting a couple years to play out.
As a personal guess I would say next year will see a P85+ come out.