I am getting some information from our readers about a potential Nikon D400 announcement this fall (during Photokina in September, shipping in October). I was not going to post anything when I first got some speculative information about the D400, but when the same person that sent me some details earlier this year on the D800 (which turned out to be 100% true) confirmed the D400 specs, I decided to post what I have regarding the upcoming DSLR. I am still a little skeptical about some of this, since it could contradict the potential announcement of the Nikon D600 that I wrote about a couple of weeks ago. If Nikon does indeed release the D600 at a ~$1,500 price point, it would have to severely handicap many of its features, if the below specifications turn out to be true. Otherwise, Nikon will have a hard time selling the D400 in my opinion. Nikon is apparently already working on D400 production in its Sendai plant in Japan.
Here is a summary of the Nikon D400 specifications that I have received from multiple sources: