Why not change the all star dunk contest to a HORSE contest.
You have 4 guys. The first guy dunks, if he misses his own dunk he gets a letter. If he makes it everyone else has to make it or they get a letter. Maybe give them two chances to make it since the original guy had time to plan it out. then it goes to the next guy.
No gimmicks, no celebrities, no cars to jump over but I think it would be much more entertaining to watch. Anyone who is fiends with David Stern feel free to pass this along to him.