KC can barely support two teams, what makes anyone think they could support the NBA? The idea of hockey moving there is even more ridiculous. I remember when everyone got huge boners over the idea of the Pens moving to KC. There's not a hockey fan within 500 miles of KC and they want a team there? As for the NBA, I don't think there's enough moola in KC to fill the Sprint and keep it competitive.
Have you taken a poll of this? I know a lot of Hockey fans (I am not one) in this area. I know a lot of NBA fans in this area as well (myself included) People will go and support these teams if they are brought in.
No I've not taken a poll.

Think I waste my time wondering what people in KC are up to? As far as hockey... There are honestly too many teams in the league and the bad ones (or ones that should never exist, like KC) are in non-hockey areas and can't find support. It takes a pretty good sized city and/or a strong hockey following to support an NHL team.
With the NBA... Just watch OKC. They'll be a good example of a team that will get support at first because they're the only gig in town, but if they continue to lose for the next couple years, they'll be looking for a new home. The NBA is a tough biz and you really have to have a larger market to support it and have them do well. The Sacramento metro is about the same size as KC but has just the one team, and obviously the Maloofs must be interested in getting out of town.