Basketball is a game requiring accuracy, aggression and ability to play in team, while roller skating is 100% individual.
My idea is combining these kinds of sport by putting roller skates on basketball players. Though it wouldn't let players jump and make fantastic "michaeljordaneous" slam-dunks and make them less steady, it would increase their movement speed and require extra movement coordination skills.

Plus this kind of sport would look exotic and be twice as good for players' muscles as basketball. Also, this game should be played on a field considerably larger than standard basketball one, and the players should always wear protectors in order to avoid bruises and traumas.