What sport could become one of America's newest favorites?

Arguably, the current top four most popular sports are: football, baseball, basketball and hockey. We can agree or disagree with that at another time.

In the near or distant future, do you think this will change? Will a different sport rise in popularity? If so, which one and why? How will this affect our society? Will it gain it’s own three-letter abbreviation (NHL, MLB…)? Will you become one of it’s biggest fans?

It can be an existing sport, a past sport, or even a brand new one that you made up.