The next Nikon announcement will be for the Nikon 1 V2 mirrorless camera. This is not a surprise after the huge price V1 drop reported few days ago. Similar to the J2, the V2 will offer only minor improvements over the V1 (the V1 already has the 921k dots screen). There is some talk that the V2 model may have WiFi and GPS capabilities, but it is still too early to be certain about the details. Expect the official announcement before the end of 2012. This may not be the only new product introduction before the 2013 CES show that will take place in early January 2013.
Oh, and DX format is not dead yet.