The next Nikon announcement will be for a new consumer DX lens. The official release will probably take place in the second half of October. There is a low chance that other products will be announced at the same time. This will be another "silent announcement" - no press events, no big marketing campaigns, just a DX lens (similar to the 40mm f/2.8 lens announcement).
Needless to say there are no reliable updates on any full frame products.