A few days ago, Nikon accidentally leaked a new 50mm 1.8G AF-S lens. That's fine, and I love my 35mm f/1.8g, but what I'd really like to see is a full line of DX lenses. I've seen Thom Hogan speculate about this before, and I like some of his suggestions, but here's what I'd like to see.
AF-S DX NIKKOR 15mm f/4G
AF-S DX NIKKOR 24mm f/2G
AF-S DX NIKKOR 35mm f/1.8G
AF-S DX NIKKOR 58mm f/1.8G
AF-S DX Zoom-NIKKOR 55-200mm f/4G ED
That would really do it for me. There's a real wide angle prime, a wide-normal to complement the 35mm we already have, a portrait lens and a prosumer zoom.
Seen at Nikon Rumors.
Update: The day after I wrote this, Thom Hogan touched on this same topic again. It's on his front page currently, but his content moves around. Here's the relevant part.
At the risk of repeating myself: 16-50mm f/2.8, 50-135mm f/2.8, 16mm f/2.8 (preferably faster, but needs to be small), 20mm f/1.8, and 50mm f/1.8 at a minimum.
Not exactly what he asked for before, but any new DX lenses would be nice.