Gentlemen, things are already changing. In Vancouver, Canada, the NBA tried to expand with a franchise (I think they were called the Grizzlies)but the city did not like the essentially all black lineup and the team was sent packing after only a few years. In Toronto, the Raptors' all black team was a no-draw at the gate and had to be supported by the all white hockey team, the Maple Leafs, with whom they share a building. The team got a new GM and he started bringing in white players and voila! Now the team draws. Again in Toronto, the professional soccer team, Toronto FC, has bigger attendence than the MLB Toronto Blue Jays even though the Blue Jays are mostly white.
What boxing promoter in his right mind would put up an all black card? They don't and expect to make much money. White fighters draw and whites pay to see them. The UFC draws 16,000+ on a regular basis, how many boxing venues can brag of that?
Price and likeness have a lot to do with selling tickets and getting either pay-per-views or live television audience. Blacks want to watch blacks, Orientals want to see themselves, Latinos want to see themselves, and mostly whites want to watch whites as well. Many of those people that we call Dumb White Fans are at the stadiums or watching on TV to see how their whites are doing against the blacks. Last season the most viewed NFL football matches were with the Indianapolis Colts or the New England Patriots. Both of those teams drew playoff-like television ratings (13-15) at their best of times. Why? Because those teams were the whitest teams or perceived as so. What teams had the worst television ratings? Yes, you guessed it, teams like the Jacksonville Jaguars (4-5 on some weekends!).
Inspite of years of brainwashing and hype, whites collectively still prefer to watch their own kind. The NFL does not have some kind of thousand year reign locked up as king of all sports. The NFL is not immune from change. The subliminal slogan: "black people are cool you should watch them and love them" is, and will continue to wear thin.
I do agree with Europe above though, whites are turning away from sports with heavy black participation and playing sports like rugby, lacrosse, hockey, and soccer especially. Mothers and fathers do not want their children associating with blacks for fear of bad influences. It will take time but the seeds to the decline in U.S. football are already being planted. How can any company reject their majority and best customers and thrive? Without any doubt the NFL rejects white men both implicitly and explicitly. So ask yourselves the question: how long will white men continue to be their best customers? Have you seen a good boxing match lately?