KC's arena situation was awful and I don't know if going by what a team did in the 70's has any bearing on today's NHL. The Sprint Center is one of the most beautiful new arena's in the league and I would think the NHL would target a place that is NHL ready in terms of stadiums if they're looking to expand.
Anything that occurred before Luxury Boxes and Corporate Seats became the norm in the Late '80's should have no bearing at all on today's NHL or NBA.
That stated, the fact that KC stopped supporting the NBA's Kings, despite exciting, competitive teams year-after-year, sends up a much bigger red flag than anything that happened with the Scouts or the Cleveland Barons, for that matter.
Neither the Scouts or Barons had a chance in markets that simply were not big enough at the time to support four Pro franchises, much less three.
My vote is for expansion franchises for Portland and KC. And should Phoenix be forced to move, Quebec City seems logical. Or, if another ownership group emerges, Atlanta, which is a much bigger TV market than either Winnipeg or Quebec City can ever hope to be.