In what's starting to look like another pattern, Nikon released one lens by itself (this has happened in April for the last three years running). If the pattern holds, we'd get another handful of lenses announced in July or August.
The 50mm f/1.8G AF-S was accidentally leaked by Nikon last week when a Web page went up early (and was taken down very quickly), so we already know the pertinent details: this is the AF-S replacement to the 50mm f/1.8D. The lens covers the full FX frame and has MTF numbers that make it look like it might be the best 50mm yet. 58mm filter threads, 1.5' close focus, very small and very light (6.6 ounces).
What wasn't known at the time of the leak were two things: price and availability. Price is US$219, and NikonUSA is telling dealers to expect a mid-June arrival date.
At this point I think it's safe to expect a revised 85mm f/1.8G AF-S, too, though when is another matter. It does appear that Nikon is going through and refreshing most of the previously popular fixed focal length lenses, something they've done for pretty much the entire history of the F mount.
I should point out that the 50mm f/1.8G looks like it will make a very respectable (and small) DX portrait lens. At 75mm equivalent, 7-blade aperture, and f/1.8, it isn't a perfect fit. Still, the image samples I've seen seem to suggest that it works quite well for portraits on a DX body. And at US$219 and 6.6 ounces, it doesn't make much of a dent on your wallet or bag, so is worth experimenting with.