Okay, in TV, programs exist to sell advertising. The advertisers are the customers, and they buy viewers. To get a show on tv, you've got to identify potential advertisers, then deliver the viewers.
So, where could cyclocross fit in? Maybe as part of a packaged show, one that has downhill skiing and bobsledding or something mixed up Wide World of Sports - style. I think Jeep sponsors a show with downhill mtn biking and similar stuff, a segment on there may be your best bet.
Even though you don't need helicopters to cover cyclocross, it's still incredibly expensive to cover sports. You'd need six or seven cameras and a production truck, remote commentator booth. That's a huge crew. And weather to deal with, it's not inside. All just stupid expensive compared to the ad revinue the programming would draw.
Also, unlike MLB or NHL or the PGA, there's no deep-pockets cyclocross league to eat the costs up front. That's why bundling it with other sports is the best option, I think. Sort of like diversifying an investment portfolio, to a potential sponsor. Either that, or work on repackaging taped broadcasts of European tv coverage to air in the us. That would be cheaper to produce, but prohibitively expensive rights-wise.
In the US, public tv doesn't cover sports, so that's not an option. Not sure about other countries.
Yeah, when you think it through, there's a reason that the only way to watch cross on TV in the US is on DVD. Selling programming direct to viewers on dvd is the most cost effective way to go.