I still expect Nikon to announce three major cameras by the end of the year. Some of the announcements (most likely the D5300) could be in the first week of January right before the CES show in Las Vegas.
I was told that the rumored Nikon D610 DSLR camera will be on display during the Photo Plus Expo in New York at the end of October. This means that the official announcement should be any day now. I still do not have any detailed specs or exact announcement date.
Nikon D4x or similar
I think the decision to release the D610 will postpone any initial plans Nikon had for another full frame pro body. Nikon recently announced that they will concentrate on entry level models. There is still a possibility that they may announce something in early 2014 right before the Winter Olympics.
The third camera still remains a mystery. There is a very good chance that it will be a new underwater camera that could be branded under the Nikon 1 product line. Not sure how they will handle the lenses - maybe they will announce a new line of ruggedized and waterproof Nikon 1 lenses.
I only have information for two new lenses: Nikkor AF-S 300mm f/4G VR lens and a new 16mm fisheye lens. There is also a very good chance for a new Nikon TC-14E III teleconverter to be announced before the Olympics.
I want to mention again that there is no Nikon D400 coming any time soon.
I have not received any tips on that, but Aptina's VP mentioned that a new compact camera with 1" sensor is expected to be announced at the beginning of next year by one of "their current customers".
If you have any information on the listed products above or on any other tips on an upcoming Nikon announcement, please contact me (no email needed to submit a tip). Reliable information has been scarce lately.