During the last years we have watched a plenty of fighters cancelled their fights 1-3 weeks before and i some cases the events has been cancelled (Jon Jones vs Dan Henderson ) and also Jose Aldo vs Chad Mendes i august 2014 if i am not mistaken, this is not something UFC can afford to have cancelled fights. Now when the NSAC have banned IV it will be harder for some fighters to make the weight compare to before. Dont forget about Reebook, as soon the contract has been expired UFC will have much tougher to hold them like Benson Hendeson and i believe that before 2020 Bellator might be closer to their goal to be a huge competiotion. Rizin might also be a good place for heavyweights strikers like Overeem,Bigfoot Silva and JDS , for right money they will fight there. I just cant see UFC doing well during the coming years since Ronda ,Sage and Van Zant have lost and now it is Conors turn to get a big KO loss.