I like to do this kind of thing. Humor me if you will.
If they happen today, who wins the rematch?
BJ Penn vs Diego Sanchez- let's make this a 162 lbs catchweight fight
Benson Henderson vs Anthony Pettis
Dan Henderson vs Anderson Silva- let's make this a 195lbs catchweight
Andrei Arlovski vs Roy Nelson
Carlos Condit vs Rory MacDonald
Dan Henderson vs Rampage Jackson
These are my picks, I'm not sure about Condit beating Rory but I'll go with my heart and say Condit since I like him more. It's a 50/50 fight tho IMO.
Edit: Same kind of goes for Bendo/Pettis.