I sympathize with Dana White's reluctance to have champion vs. champion fights, especially after what happened in UFC 94. Champion vs. Champion super-fights, like the St-Pierre vs. Penn 2 fight, create several potential problems. First, one fighter will probably be bigger and stronger than the other. Second, it puts one division on hold for close to a year, bottle-necking contenders and creating stagnation in a division. Lastly, like St-Pierre/Penn, they probably in the end are more bark than bite. Its why more-so than White, Georges St-Pierre himself has been reluctant to move up and fight Anderson Silva because he saw the problems Penn had and understand greatness comes from fighting at your proper weight class.
But thinking about Frankie Edgar and Jose Aldo, its different. Edgar is small enough to be a featherweight and Aldo is big enough to be a lightweight - that is this biggest factor in its favor. This could be for either title. They're styles match well, too. Aldo is all forward movement motion with strikes and kicks. Edgar is slick and slippery, and consistently faster than anyone else he's fought. As White also says over and over, timing is everything. Both guys are on the same fight track, so to speak, fighting very close to each other so one wouldn't have
Both still have work to do. Edgar needs to take care of Gray Maynard, Anthony Pettis, and eventually Gilbert Melendez. Aldo needs to handle Mark Hominick in Canada, and then take care of Chad Mendes and then add a UFC veteran scalp to his wall - someone like Kenny Florian or Joe Stevenson. So this is something that is far off. But while so many super-fights excite us, most aren't something that realistically will happen. Can GSP get as huge as Silva? Could Silva, at his age, bulk up sufficiently to fight Jon Jones - who himself could probably fight at heavyweight given his frame? But with Edgar and Aldo, that size problem disappears.
I realize that this would be a fight very far away, and of the two Edgar is much more likely not too make it considering the potential challengers and depth of his division. Maynard almost KO'd him, Pettis is a matrix, and Melendez - it can be argued - IS the top lightweight right now. But Aldo will, I think, really be pushed by Hominick who is a cagey veteran and a very skilled technical kick-boxer. I think Aldo-Hominick will be a mini-me version of Gonzaga vs. Carwin, where Hominick will tag Aldo and buckle him, but eventually get overwhelmed. Chad Mendes is nothing to mess with, and someone like Florian or Stevenson - former lightweight title challengers - will show what Aldo could do against a bigger opponent.
But of all the potential lightweights out there, its Edgar I see as the most exciting challenger for Aldo.
Obviously, by the end of next month this could be a useless post, but I would be stoked to see this fight and of all the super-fights, this is the one that actually CAN happen.