User blog comment:Martialmaniac/Current arc's name confirmed: Succession Contest arc/@comment-31525652-20170627001026/@comment-31525652-20170627002641

The reason I put Hisoka vs Chrollo in the first arc is because it sets up the phantom troupe's revelance in the ship. The arc tells us first that Beyond and his team will travel there, then confirms the Zodiacs will take a part in the journey as well, then the 14 princes, the phantom troupe and finally Hisoka. It's all coherent this way and serve the same premise.

The succession contest starts at chapter 358 (Eve) since that's when all the 14 princes gathers and meet on the Black Whale.