Good to see you on the site again Lolyton
I've been doing the news, and recently Canon were the first to blink with their new range, the hot potato being the 40D. I have seen nothing to indicate that another camera is in the offing, and I'd guess that any 5D replacement will not be until the next window of change.
The Canon followers will be far more aware of when this might be. My guess is also next year. Maybe Spring?