For mixed martial arts to be successful, the UFC has to be successful.
That's been the narrative for the sport ever since its leading American promotion hit the mainstream, and there have been many bumps along the way.
No matter where you look, there's always a battle being fought as the UFC strives to live up to Dana White's claim that the sport will one day be on the same level as football, basketball, hockey and baseball.
Heck, just being equivalent to NASCAR would be a feat.
But what problems does the UFC face going forward?
Plenty, as a matter of fact—and these are the eight biggest concerns facing the promotion in the coming years.