This image is from the CMLC site for the Rivers District redevelopment.
The area in the foreground of the image is where the bus barn currently sits. I believe the road is 11th Ave, which currently stops at 6th St because that's where the garage is.
Within the next decade (assuming they can get funding for this), the Transit Garage will be moved anyway. I'm not sure how that sort of thing would be financed between Calgary Transit and Council normally with or without the Olympics. It makes perfect sense to me that you wouldn't include the cost of the new garage into the costs of the replacement buildings.