A700 - D300 replacements
Both the A700 and the D300 are joined at the hip (well at the sensor).
The Nikon D300s is a stop gap to keep the model alive until the D400.
My expectation is that both the D400 and the A700 replacement are waiting for the availability of an APC sized Elmor-R sensor. It will out of marketing necessity be beyond 15M anyones guess where it will end up.
Timing who knows....