The Paris Expo has a sign hanging in it that has been covered up with a black cloth. The web site NikonRumors.com has received a picture showing what is on that sign at the Nikon booth – the Nikon D3s !!! there she is folks 
You can see the picture on the site (click the link in the previous sentence) so this no longer qualifies as a rumor and the info is getting leaked along with solid evidence.