I guess one question: Where do the Jays play when they're demo-ing SkyDome? Montreal? Vancouver? Dunedin? Buffalo? All of them?
The problem with comparing Bremner with the Ottawa or Edmonton districts is that, and others can feel free to correct me on this, those two cities really lacked central, core, mixed-use areas in those particular spots, and so Lansdowne and Edmonton were filling in a big hole in those markets. I'm not convinced the Bremner/SkyDome area is as desperate for a mixed-use area as those other two, especially considering that there are things like movie theatres and gyms not that far away. There will obviously always be demand for things like condos, but there would have to be a good chunk of them to offset the costs of downsizing from SkyDome. This might be the first time in history that Toronto takes a cue from something Ottawa has done, though.
The Exhibition/BMO development is more interesting IMO as it is definitely more in-need for mixed-usage.