I just looked up D400 on Google to see what was up, and it looks real to me. I hope it is released.
I won't be buying a DSLR until the spring, so it's all film until then, and I'm aching to buy an F100 and an F4 ASAP.
By the time I can buy digital, the D400 should be available, or it's just a pipe dream. I'm still torn between a D7200 and a D750, but I wonder if the D750 will have its successor by then, and the price will have dropped by a few hundred $$$. $2079 at Amazon.ca seems like the best price.