Most of the Nikon AF-S 50mm f/1.8G lens specs are already know. This f/1.8G lens will have a new design with one aspherical element (the old f/1.8D version did not have an aspherical element) and it will also come with a lens hood and a case (with the old version those were optional).
Here is a MTF chart comparison between the new f/1.8G and the old f/1.8D versions (see all 50mm MTF charts here):
I do not know the Nikon AF-S 50mm f/1.8G price yet. No 0ther products will be announced with this lens.