This fight will never happen as McGregor knows exactly that he has no chance against Khabib. And he would not get more than 5 million for that fight.
Mcgregor isn’t coming back to ufc for peanuts and leaving mills on the table in boxing for less then 20 mill. Just forget it.
Conor McGregor being out for 2 and a half years, doing boxing, not training rigorously and potentially will be rusty on his comeback vs the elite, undefeated Khabib. It's a bit like Rousey coming back against Nunes. I think logic says Conor will lose. I think it's most likely he comes back for the rubber march vs Nate Diaz with Nick on the undercard.