This will be a boring to watch and we already know who will win obviously. Manny Pacquaio will kick Conor McGregor's ass. I'd rather to throw my money to watch these following matches:
I don't think that Pacquiao will be interested in this match too. He'd rather face a fellow boxer to retain his reputation than a MMA fighter which is popular but... I don't know but if this will happen, it will depend if it will happen on the Boxing Ring or on the Octagon 
.Conor McGregor vs Masdival
This is the next match that is for me most likely to happen. They are good match and their last fight are both wins. I will wait for this Conor McGregor vs Khabib 2
McGregor can kick already unlike his last matches that he mostly uses his fists. If this will happen, I think McGregor must learn how to grapple because Khabib is very expert at grappling and it is his specialty. He must learn how to counter it in order to defeat him.