They had a bevy of superstars, now all their superstars are beat down, knocked out, exposed, finished or retired. So its back to the grind of overhyping some other flash in the pan?
Of course not! This is been happening since the beginning. They will just find some others to take there place or recycle some old ones.
2016 was their most profitable year. They still have their biggest star The Irishman. They have Jon Jones. If they can get in agreement with GSP who wants to fight again, they will have him. But the UFC's appeal has never been stars. It's been consistently putting on high quality Entertaining Fights.
UFC's initial appeal was because it was new and different and extremely violent. But eventually a sport is always carried by its stars, Anthony. Without stars, a sport dies eventually.