Great discussion. Yeah, I would factor out Vancouver/Thunderbird.
I would honestly rule out any arena with an NHL team in it for two reasons. First is, it would be too expensive to secure the arena and displace the team and second even with top closed off the relatively cavernous atmosphere just may not be to SC's liking.
Moncton. Interesting. I could see Halifax getting it before them but who knows. Don't they already have a pretty big arena? I wonder why building another one....?
I would rule out Kingston and old Maple Leaf Gardens. Way too small. Also, I went to Nats in Kingston and I have to say it's one of the more dismal arenas I have ever been in. Horrible atmosphere.
Also I don't think Quebec as an entire province has an arena in the 7-10K size. Strange but maybe true.
https://en.wikipedia.org/wiki/Centre_Bell
capacity 21,000 in mtl-restaurants 2 metro stations and the train station
While Halifax and Ottawa will always be the usual suspects, I'm going to call out Regina, Kitchener and Victoria as legit dark horses to get one of the 2 big international events coming up.
Not much discussion about Regina. Brandt Centre is over 6K in capacity...and it's part of the Megaplex Evraz Place with all sorts of facilities including practice rinks.