I find the proposed Ottawa arena (who knows if this is close to the final design) looks similar to the latest defunct Calgary proposal.
https://www.cbc.ca/news/canada/ottaw...rena-1.6498710
https://www.sportsnet.ca/hockey/nhl/...-flames-arena/
Here's the arena proposed previously for the failed RVL bid a few years back, that one was designed by Rossetti, as was Calgary's. Haven't heard who designed the current Ottawa iteration but it does seem like it may be Rossetti as well.
https://www.cbc.ca/news/canada/ottaw...oing-1.6411718