We've had a couple of communications saying that Canon will announce the replacement to the EOS 7D some time in late March. We've had nothing from the usual sources as of yet, and it's tough to tell whether or not it's reported rumors fuelling speculation, or the speculation fuelling the reported rumors. It's the usual chicken and the egg thing.
There hasn't been much information about specifications for such a camera, and I'm sure Canon will have a massive marketing campaign behind it. If we don't hear something a bit more concrete soon, I wouldn't put much stock in the March announcement speculation.
Yesterday we were shown that Canon plans to update the Pixma Pro printers in the near future, those generally get announced with a DSLR, so that's a positive sign in the right direction.
More to come…