I think it's clear Chuck wants to fight still, because if he really wanted to retire, he would have done it by now. Now whether or not that is the right thing for him, I do not know.
Wandy vs. Chuck II would be fun to see. A dream match wouldn't be a bad way to go out (disregarding Chuck/Wandy II). That just leaves the question of who to fight, whether it be Wandy or not.