Conor will win by knockout within the first 3 rounds. If not, it will either go the distance or Alvarez will submit him. Conor has 3 losses, all from submissions. One from 2008, one from 2010, and the most recent in 2016 by Diaz. Conor does have a longer reach than Eddie as well. If Eddie can avoid McGregor's power strikes, I think he will try to submit him. He probably knows that Conor hasn't been knocked out and it will be easier to try to lure him to the ground instead of going the full rounds. With that said I am a McGregor fan and hope he wins.
My bets will be:
McGregor by KO/TKO
Alvarez by Submission
and depending on the odds I will probably bet fight goes the distance/fight doesn't go the distance.