DFW-YEG maybe has a chance, because of oil (Exxon having its HQ in Irving)
DFW-YWG not a chance. ORD-YWG with AE is more likely.
LAX-YVR has a chance, but before they do that, they will probably start, like someone said earlier, SJC-YVR or SJC-YYC. Put your money on SJC-YVR, though, as CP operated the route for AA twice daily with a Fokker F.28, so maybe you could see two daily Fokker 100's or two daily ERJ's on the route.
Sorry, but I do not think Miami-YVR is such a big priority for them. In the summer it might work, as it connects the two big Cruise ship ports, but is that enough to carry the route? I doubt it.