He has so many young devotees who have dedicated themselves to his worship. You'll find posters with 2,000 posts and September 2014 join dates, each post singing Conor's praises. Others have incorporated McGregor into their screen names. What will happen to them when he loses? Will they recant? Will they jointly author a thread apologizing for their obnoxious behavior?
I predict that they will abruptly stop posting to avoid ridicule. The remainder will say "well, I never thought he was that good, just exciting." There is a slight possibility of suicide, but I doubt they are that honorable.
What's your prediction (or what will you do)?