Volleyball season coincides with Football and Basketball season. If it was in the Spring/Summer it would have a better chance of catching on. As it stands nobody is going to watch a volleyball match over a college or pro football game. Id watch it over baseball though.
that and, at least in my experience, it's a female sport in the US. yea, there are male teams, but i don't think i ever came across a high school with a male team in my are, and we all know female team sports just don't get love like that in the US. plus men are nowhere near conditioned to thinking about male volleyball. volleyball has too many hurdles to climb in the US before being "the next big sport"