A Superfight indeed. But I dont understand why Edgar is such a big underdog. This guy arguably never lost the Lightweight title. The 1st Bendo fight, 40% of the MMA community has the fight scored for him and the second fight, 70% of the MMA community gave him the nod. So in my eyes, this is a Champion VS Champion fight.
On to the topic, if Edgar is not badly affected by the weight cut (which he shouldn't be) he should be able to win this match. Stylistically, he is a nightmare matchup for Aldo. Excellent footwork and boxing to combat with Aldo on feet with a solid wrestling base (especially now, he is in featherweight).
On top of that, Aldo tend to gas out in the championship rounds evident from the Hominick and Florian fight as compared to Edgar who went 5 full action pack rounds with BJ (twice) Maynard, and Bendo(twice) without looking gased. Aldo best chance will be a big finish early in the fight but hey, Edgar has proven time and time again that he can fight back after being on the verge of getting knock out.
I think Edgar will win, but I'm not surprised he is an underdog going into this fight. Even though he has the more impressive resume. The fact of the matter is he is going to a weightclass he has never fought at and immediately taking on the champ. I don't know many fighters that wouldn't be the underdog going into that situation.