The Trail Blazers, very quietly, threw their hat in the ring to make Portland a landing spot back when this all started. They already have the arena. Seattle still makes more sense. Save Quebec City for an Eastern team that needs to relocate. ("Bienvenue au Québec, Panthers de la Floride!")
Don't see any NHL teams going to Quebec yet. The NHL has a very lucrative deal with NBC Sports. Right now there are 23 teams in the USA. I believe the deal states that the NHL must have at least 22 USA teams.