Oda is very clearly setting up a confrontation between the Revolutionary Commanders/Deputy Commanders and SWORD. The characters in pic related likely solely exist so they can fight Hibari, Prince Grus etc, who in turn solely exists to fight the Revo Commanders. Hibari will fight Koala. Helmeppo might take on one of the stronger Revolutionary Commanders like Karasu or maybe even Ivankov.

Koby vs Sabo has high potential as a fight and a clash between ideologies.