Vancouver 2030 isn't happening, even if CBC has the Olympics contract sewn up through 2032. And 2034 probably won't happen either, regardless of it being a First Nations bid.
It will be Sapporo. They released the preliminary public poll results last month and a majority favors a bid for 2030. They're going to release the detailed results/analysis this month, but it's highly unlikely that anything is going to change and the city officials and bid organizers have already said that a favorable public poll is enough to move forward with their bid. Guaranteed, the IOC wants Sapporo and the USOPC would prefer 2034 for SLC, so they won't be too upset. I fully expect both to be moved from the "continuous dialogue" stage to the "targeted dialogue" stage this summer at the IOC's meeting.