I know Houston has been mentioned for NHL expansion... nothing substantial just talk among fans. I think the only way they lose the AHL Aeros is if the Aeros name is used for a NHL franchise.
Des Moines I know is always mentioned as expansion for the CHL. Again just rumors, nothing substantial.
I wouldn't think the AHL will leave a market like Houston anytime soon. And if that were to happen, the CHL would be wise to move in
