[fever]

I don't see why they'd build two new rail bridge/tunnels when it's taken so long to replace the old New West bridge.

Based purely on speculation, I'd go with a consolidated railyard in Pitt Meadows/PoCo where there would be lines to Vanterm and Centerm, Richmond through New West, and Deltaport by way of the existing rail bridge at New West until a replacement is built somewhere between it and the Port Mann. (This scenario's probably been mentioned on here before.)