Diaz 3 at 155 is the fight that makes the most sense. Diaz 2 was the best selling PPV in UFC history, the trilogy will be even bigger considering the early round stoppage in fight 1 and the controversial scoring of fight 2. 145 is out of the question after the IV ban. Mcgregor can't pull a Margarito anymore cutting down 2 weight classes to beat up on smaller men. Besides Aldo reclaimed legitimacy over that weight class after beating the #1 contender Mcgregor ducked multiple times and ultimately ran out of the division to avoid. Alvarez would wreck Mcgregor, as would other top contenders at 155.
