D7000
• Replaces D90/D5000.
• Announcement in Jan/Feb 2010.
• 14MP* CMOS sensor (similar to Sony A550 sensor).
• No* AF motor.
• New* AF module: CAM2000, 20 area.
• 5 FPS.
• Live View & 1080* video.
• Articulated 920K LCD.
• OVF same as D90.
• Weight and size below D90 “thanks” to the removal of the AF motor.
D4000
• Replaces D3000/D5000.
• Announcement in 2nd half of 2010.
• 12MP CMOS sensor.
• No AF motor.
• OVF & AF module same as D3000/D5000.
• 3.5 FPS.
• Live View*, but no video.
• Fixed 230K LCD.
• No AEB.
D400
• Replaces D300S.
• Announcement in 1st half of 2011.
• 16MP or higher* CMOS sensor (same new sensor as upcoming Sony A700 replacement).
• AF motor still there.
• 8 FPS (without the grip).
• Live View & special* high quality 1080 video (possibly RAW video???!!!).
• Articulated* 920K LCD.
• OVF & AF module same as D300S.”
Quelle: http://nikonrumors.com/