I think Arreola will win this rematch.

Stiverne will be 36 years old this year, Arreola is 33.

Inactivity is a problem with many current fighters.
Their fight was 1 year ago, and Stiverne hasn't fought since.
Arreola has only fought once since that 1-sided decision loss.

Stiverne:
1 fight scheduled for 2014 (Upcoming Arreola rematch)
1 fight in 2013
1 fight in 2012
2 fights in 2011
1 fight in 2010

^ Aside from the Arreola fights, these are not even important headliner fights.
What a waste of one's athletic prime!