If Zolo has to take revenge on someone, it's definitely Enel cuz he was negging his ass in two moves.
Remember his promise to Painthawk?
A few arcs later:
One funny thing, I got even flamed on by this ice-flo dude for stating "Zolo" when the official translation kept calling Zoro "Zolo", so technically, I still did nothing wrong lol.
Before Zolo has his rematch against Painthawk, he should rather settle the score with Enel who actually managed to win against Zolo in a fight.