Jason. Whilst I understand your rational, I really do believe a D400 is on the way. My reasoning is that Canon will produce a 7D MKII or some such derivative. Some of my reasoning is based on the launch of Nikons new AF-S 80-400mm, as a direct response to the Canon 100-400 IS, albeit a very late one. Nikon knows there's a thirst for a semi pro successor to the D300s by the volume they sold. I feel Nikon already have the means to mass produce a D400 and the button may be pushed when a Canon 7D is announced.