I'm stealing this from a Bill Simmons article earlier this year. These teams appear to be in some sort of financial trouble from what he says.
You need a team with a dwindling fan base and/or bailing sponsors and suite/courtside customers. (I count 11: Indiana, Memphis, Milwaukee, Sacramento, New Jersey, New Orleans, Miami, Orlando, Minnesota, Charlotte and Philly.) You need a team trapped in an aging stadium that can't drum up local money for a new one. (I count three: Sacramento, Jersey and Milwaukee.) You need an owner who purchased his team because he was worth a ton of money ON PAPER … only now, he's worth significantly less and might even be worth $10 for all we know. (Consensus candidates for this list: Phoenix, Hijack City, Jersey, Memphis, Indiana, Atlanta, Milwaukee, Charlotte … and, surprisingly, Sacramento and Cleveland.)