Agreed, this is an absolutely huge fight. The winner of this will have a pretty legitimate claim to being the p4p best fighter in the world. I really really mean that btw.
I am a huge fan of both of these dudes. IMO, Edgar's takedowns won't be good enough to get Aldo down consistently, and frankly, Frankie takes too much damage in the standup. Maynard had him ruined on multiple occasions, and Aldo is faster, more precise, and packs more firepower than Gray if you ask me, so the most reasonable outcome is Aldo by sizzling 2nd or 3rd round KO.