Paul Allen (cofounded Microsoft, owns the Trailblazers, Seahawks, and Sounders) has expressed interest in bringing the NHL to Portland, so there's definitely ownership there. The folks who got the arena deal going and were gonna own the Sonics were apparently also interested in the NHL. Not to mention there are plenty of tech billionaires to court. I mean FFS Nintendo owns the Mariners. You can find an owner for a sports team in Seattle, easily.
I think a little cluster of teams in the Pac Northwest could be a lot of fun and possibly make the Canucks a bit more relevant on the national stage.
Also, I'm strongly of the opinion that they'll figure realignment out after the fact, and that it's basically a trivial factor in considering expansion/relocation bids. Far, far less important than ownership/arena/market/etc. Getting up to 32 teams is vaguely important, but making sure they can completely preserve the current order is not.