Slamball is a derivative of the slamball played at those new agey Employee Retreats - it first started about 5 or 6 years ago as a big blow-up activity, not unlike a moon bounce. Pic here - also check out the human foosball game. If that doesn't look like a great game for the next neighborhood block party I don't know what does. I guess Blitzball is next, for athletes with really strong lungs.
Hmmm....not sure if this show will be on the up-and-up (not that we should care). I'm in LA (sometmes working in television) and know they were interviewing writers to come up with "characters" and "backstory" for the project. It may have changed since then, but since when did the NBA -- or even the Winter X Games for that matter-- ask people to cook up storylines?
Perhaps its going to come from the World Wrestling Federation school of "sport"?