I feel like Aldo is the better match up for McGregor - Mendes could potentially hold down the latter for 5 rounds, and Aldo won't do that.
That's the danger with the 2 possible opponent thing though. I doubt he's been concentrating so much on his TDD in this camp so far, but if he ends up fighting Mendes he will have needed to. Conor uses a lot of spin kicks etc. to get people to commit so he can counter, would he use the same tactic against a wrestler? Probably not.
It is mad about Aldo that he has pulled out of a lot of fights in the past and Conor predicted this back in December, I wonder if there is more to it than just injuries. We've seen more and more fighters pulling out of top fights 'due to injury' over the last few years, with so much at stake in losing your belt, but so many endorsements on offer for holding on to it, it does pose the question.
For a guy who frequently complains about money though, this is Aldo's chance for the biggest payday of his life. I doubt he'll want to miss out on that, but he does have a ready excuse now if he were to lose for an immediate rematch $$$. I reckon he'll fight.