Given that there is no existing team name, I imagine they'll want to tie the name in thematically with whatever the NHL team is to be called.
See, e.g., the Flames calling their franchise the Heat (alongside finalist names Blaze, Fire, Inferno, and Scorch).
I'll made the bold assumption that "Sun" will not be remotely close thematically to the NHL team's name. Firebirds seems a stretch too.
I'd predict Dragons, based on my belief that Kraken will be the NHL team's name. Mythical creatures abound, and Dragons would work better with a Green colour scheme than the other finalists.