No procurement news yet, although I imagine it would be soon to get the ball rolling on a large order, especially if they have to wait for others in line ahead. Right now the Bombardier LRV is taking a bit of a kicking, at least in North America, so it wouldn’t be hard to go elsewhere now. They’ve got a lot of orders between TTC, Metrolinx and ION in southern Ontario (even after Metrolinx cut their order down substantially), and now Edmonton - and as most here likely know, the quality of their vehicles has been terrible and many have been sent back from the Ontario systems. The Edmonton vehicle on display now looks good, but I’m sure that one-off was built with a little extra care and attention - not to mention it hasn't actually run anywhere.
As you mentioned, Alstom took over for the cancelled Bombardier Metrolinx vehicles, and have OCTranspo's new trains, so it’ll be interesting to see how they do in Canada. Since Siemens (Calgary's only previous supplier) is in the process of merging with Alstom, it may also give the advantage to that group, and whatever product they decide to pitch (S70? Citadis?).
A lot of these orders are part of a P3 consortium, so didn’t really have much choice in vehicles. The group building the system had a partnership with a vehicle manufacturer from the beginning. Calgary is purposefully procuring LRVs separately from the rest of the Green Line project procurement, so they can pick anyone they think is best.