Both Canon and Nikon seem to be in No Hurry to introduce Pro Level APS-C/DX cameras. There are rumors that the 7D2 will be available in 2014, but the are no rumors about the Nikon D400 ever being announced, zilch, nada, nothing. Until Canon pre-announces the 7D2 it's just vaporware.
So that leaves APS-C/DX shooters looking at something that isn't Canon or Nikon.
With the p/s you can expect several models in various colors to be announced each year, but as you move up the spectrum the updates get less and less frequent. Once you get into DSLR's, the vast bulk of Canon Sales are rebels and as you move upwards in price the numbers sold drop off. Let's say it takes 100,000 rebels sold to make a camera profitable.... they might hit that in a month. They make more profit per body on a 7D, let's say it only takes 50,000 sold to make a profit..... it could take half a year.. It probably takes a couple years on a 1Dx...
The point is, it takes a lot more time to show a profit on higher end bodies, and without significant improvements over the previous model, sales will be slow. Canon is in business to make money and without a significant improvement there is no sense in them releasing newer versions. High end releases show a lot more improvement over the previous model than a mode dial that goes all the way around....
The Canon 7D, launched in 2009, is the first of the line so there is no historical data available.
This is not true with Nikon. The D200 came out in 2005, the D300 in 2007 and the D300s in 2009. Now it's 2013 and NO D400 is even rumored.
So it seems safe to say that both Canon and Nikon are'nt in any hurry to release either the 7D2 or D400. Maybe they think the upgrade path should lead to FullFrame For me, the upgrade path may lead to Fuji E-X1 or Panasonic GH3. YMMV.