That's not currently known. Considering the anticipated price, though, I'd say it will have a motor.
And the reason is, as some are already speculating, that D7000 will be the top DX camera, replacing D300s, with D400 or whatever name it gets, being a baby D700, a simpler and cheaper FX body in the 1,800-2,000USD price point.
Thus, actually, the DX line will go back to the earlier times of 3 body lines: D50, D70, D200. Now, D3xxx, D5xxx, D7xxx. Then it's clear D5xxx line will be upscaled to a D90's body level, like D7xxx is moving up to Dxxx line level.
The D70-D80-D90 sold so well because they are a line of cameras that an enthusiast likes, with dual wheels, AF engine, DoF preview, and all controls w/o requiring to go to a menu, at 1,000 USD body price. Nikon needs such a camera. My guess it'll be the D5100 next, same sensor as D7000, same video, but D90's body class.
At the bottom, maybe we'll see, soon, an EVIL (mirrorless, interchangeable camera) line arriving.
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Renato.
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