Good analysis. Though City of Edmonton has called it expansion. It's an expansion of the LRT network, although a new line. Given it intersects both existing lines, I assume it interconnects - in fact looking at the Wikipedia page for the system, the future proposed Festival line will run on part of this new track currently being built, before turning west on new track, and then joining both the existing lines at Health/Science/Jubilee.
So 35 cars maybe - still relatively a small order. But will they run a 5-minute frequency initially? I don't think the other lines started at that frequency.
How do the current cars run? They are 23 to 24 metres long, compared to the new 40-metre long Bombardier cars.